| Survey year | Believe in God; absolutely certain | Believe in God; fairly certain | Believe in God; not too/not at all certain | Believe in God; don't know | Do not believe in God | Other/don't know if they believe in God | Sample size |
|---|---|---|---|---|---|---|---|
| 2014 | 75% | 14% | 2% | 1% | 6% | 1% | 465 |
| 2007 | 83% | 11% | 2% | 1% | 2% | 1% | 528 |
Sample sizes and margins of error vary from subgroup to subgroup, from year to year and from state to state. You can see the sample size for the estimates in this chart on rollover or in the last column of the table. And visit this table to see approximate margins of error for a group of a given size. Readers should always bear in mind the approximate margin of error for the group they are examining when making comparisons with other groups or assessing the significance of trends over time. For full question wording, see the survey questionnaire.
Learn More: Believe in God; absolutely certain
Belief in God among adults in Louisiana by religious group
% of adults in Louisiana who say they…
| Religious tradition | Believe in God; absolutely certain | Believe in God; fairly certain | Believe in God; not too/not at all certain | Believe in God; don't know | Do not believe in God | Other/don't know if they believe in God | Sample size |
|---|---|---|---|---|---|---|---|
| Catholic | 74% | 17% | 4% | 2% | 2% | 1% | 130 |
| Evangelical Protestant | 87% | 11% | < 1% | 2% | < 1% | < 1% | 120 |
Sample sizes and margins of error vary from subgroup to subgroup, from year to year and from state to state. You can see the sample size for the estimates in this chart on rollover or in the last column of the table. And visit this table to see approximate margins of error for a group of a given size. Readers should always bear in mind the approximate margin of error for the group they are examining when making comparisons with other groups or assessing the significance of trends over time. For full question wording, see the survey questionnaire.
Learn More: Believe in God; absolutely certain
Switch Display To: religious group among adults in Louisiana by belief in God
Demographic✭Information
Age distribution among adults in Louisiana by belief in God
% of adults in Louisiana who are ages…
| Belief in God | 18-29 | 30-49 | 50-64 | 65+ | Sample size |
|---|---|---|---|---|---|
| Believe in God; absolutely certain | 23% | 31% | 27% | 20% | 341 |
Sample sizes and margins of error vary from subgroup to subgroup, from year to year and from state to state. You can see the sample size for the estimates in this chart on rollover or in the last column of the table. And visit this table to see approximate margins of error for a group of a given size. Readers should always bear in mind the approximate margin of error for the group they are examining when making comparisons with other groups or assessing the significance of trends over time. For full question wording, see the survey questionnaire.
Switch Display To: belief in God among adults in Louisiana by age group
Generational cohort among adults in Louisiana by belief in God
% of adults in Louisiana who are…
| Belief in God | Younger Millennial | Older Millennial | Generation X | Baby Boomer | Silent | Greatest | Sample size |
|---|---|---|---|---|---|---|---|
| Believe in God; absolutely certain | 13% | 16% | 24% | 32% | 13% | 1% | 341 |
Sample sizes and margins of error vary from subgroup to subgroup, from year to year and from state to state. You can see the sample size for the estimates in this chart on rollover or in the last column of the table. And visit this table to see approximate margins of error for a group of a given size. Readers should always bear in mind the approximate margin of error for the group they are examining when making comparisons with other groups or assessing the significance of trends over time. For full question wording, see the survey questionnaire.
Switch Display To: belief in God among adults in Louisiana by generational group
Gender composition among adults in Louisiana by belief in God
% of adults in Louisiana who are…
| Belief in God | Men | Women | Sample size |
|---|---|---|---|
| Believe in God; absolutely certain | 42% | 58% | 342 |
Sample sizes and margins of error vary from subgroup to subgroup, from year to year and from state to state. You can see the sample size for the estimates in this chart on rollover or in the last column of the table. And visit this table to see approximate margins of error for a group of a given size. Readers should always bear in mind the approximate margin of error for the group they are examining when making comparisons with other groups or assessing the significance of trends over time. For full question wording, see the survey questionnaire.
Switch Display To: belief in God among adults in Louisiana by gender
Racial and ethnic composition among adults in Louisiana by belief in God
% of adults in Louisiana who identify as…
| Belief in God | White | Black | Asian | Latino | Other/Mixed | Sample size |
|---|---|---|---|---|---|---|
| Believe in God; absolutely certain | 57% | 37% | < 1% | 3% | 3% | 338 |
Sample sizes and margins of error vary from subgroup to subgroup, from year to year and from state to state. You can see the sample size for the estimates in this chart on rollover or in the last column of the table. And visit this table to see approximate margins of error for a group of a given size. Readers should always bear in mind the approximate margin of error for the group they are examining when making comparisons with other groups or assessing the significance of trends over time. For full question wording, see the survey questionnaire.
Switch Display To: belief in God among adults in Louisiana by race/ethnicity
Immigrant status among adults in Louisiana by belief in God
% of adults in Louisiana who are…
| Belief in God | Immigrants | Second generation | Third generation or higher | Sample size |
|---|---|---|---|---|
| Believe in God; absolutely certain | 1% | 2% | 96% | 337 |
Sample sizes and margins of error vary from subgroup to subgroup, from year to year and from state to state. You can see the sample size for the estimates in this chart on rollover or in the last column of the table. And visit this table to see approximate margins of error for a group of a given size. Readers should always bear in mind the approximate margin of error for the group they are examining when making comparisons with other groups or assessing the significance of trends over time. For full question wording, see the survey questionnaire.
Switch Display To: belief in God among adults in Louisiana by immigrant status
Income distribution among adults in Louisiana by belief in God
% of adults in Louisiana who have a household income of…
| Belief in God | Less than $30,000 | $30,000-$49,999 | $50,000-$99,999 | $100,000 or more | Sample size |
|---|---|---|---|---|---|
| Believe in God; absolutely certain | 45% | 17% | 23% | 15% | 296 |
Sample sizes and margins of error vary from subgroup to subgroup, from year to year and from state to state. You can see the sample size for the estimates in this chart on rollover or in the last column of the table. And visit this table to see approximate margins of error for a group of a given size. Readers should always bear in mind the approximate margin of error for the group they are examining when making comparisons with other groups or assessing the significance of trends over time. For full question wording, see the survey questionnaire.
Switch Display To: belief in God among adults in Louisiana by household income
Educational distribution among adults in Louisiana by belief in God
% of adults in Louisiana who have completed…
| Belief in God | High school or less | Some college | College | Post-graduate degree | Sample size |
|---|---|---|---|---|---|
| Believe in God; absolutely certain | 50% | 32% | 13% | 5% | 341 |
Sample sizes and margins of error vary from subgroup to subgroup, from year to year and from state to state. You can see the sample size for the estimates in this chart on rollover or in the last column of the table. And visit this table to see approximate margins of error for a group of a given size. Readers should always bear in mind the approximate margin of error for the group they are examining when making comparisons with other groups or assessing the significance of trends over time. For full question wording, see the survey questionnaire.
Switch Display To: belief in God among adults in Louisiana by educational group
Marital status among adults in Louisiana by belief in God
% of adults in Louisiana who are…
| Belief in God | Married | Living with a partner | Divorced/separated | Widowed | Never married | Sample size |
|---|---|---|---|---|---|---|
| Believe in God; absolutely certain | 45% | 6% | 15% | 9% | 26% | 342 |
Sample sizes and margins of error vary from subgroup to subgroup, from year to year and from state to state. You can see the sample size for the estimates in this chart on rollover or in the last column of the table. And visit this table to see approximate margins of error for a group of a given size. Readers should always bear in mind the approximate margin of error for the group they are examining when making comparisons with other groups or assessing the significance of trends over time. For full question wording, see the survey questionnaire.
Switch Display To: belief in God among adults in Louisiana by marital status
Parent of children under 18 among adults in Louisiana by belief in God
% of adults in Louisiana who are…
| Belief in God | Parents | Non-parents | Sample size |
|---|---|---|---|
| Believe in God; absolutely certain | 34% | 66% | 340 |
Sample sizes and margins of error vary from subgroup to subgroup, from year to year and from state to state. You can see the sample size for the estimates in this chart on rollover or in the last column of the table. And visit this table to see approximate margins of error for a group of a given size. Readers should always bear in mind the approximate margin of error for the group they are examining when making comparisons with other groups or assessing the significance of trends over time. For full question wording, see the survey questionnaire.
Switch Display To: belief in God among adults in Louisiana by parental status
Beliefs✭and✭Practices
Importance of religion in one's life among adults in Louisiana by belief in God
% of adults in Louisiana who say religion is…
| Belief in God | Very important | Somewhat important | Not too important | Not at all important | Don't know | Sample size |
|---|---|---|---|---|---|---|
| Believe in God; absolutely certain | 85% | 13% | 1% | < 1% | < 1% | 342 |
Sample sizes and margins of error vary from subgroup to subgroup, from year to year and from state to state. You can see the sample size for the estimates in this chart on rollover or in the last column of the table. And visit this table to see approximate margins of error for a group of a given size. Readers should always bear in mind the approximate margin of error for the group they are examining when making comparisons with other groups or assessing the significance of trends over time. For full question wording, see the survey questionnaire.
Switch Display To: belief in God among adults in Louisiana by importance of religion
Attendance at religious services among adults in Louisiana by belief in God
% of adults in Louisiana who attend religious services…
| Belief in God | At least once a week | Once or twice a month/a few times a year | Seldom/never | Don't know | Sample size |
|---|---|---|---|---|---|
| Believe in God; absolutely certain | 54% | 34% | 11% | < 1% | 342 |
Sample sizes and margins of error vary from subgroup to subgroup, from year to year and from state to state. You can see the sample size for the estimates in this chart on rollover or in the last column of the table. And visit this table to see approximate margins of error for a group of a given size. Readers should always bear in mind the approximate margin of error for the group they are examining when making comparisons with other groups or assessing the significance of trends over time. For full question wording, see the survey questionnaire.
Switch Display To: belief in God among adults in Louisiana by religious attendance
Frequency of prayer among adults in Louisiana by belief in God
% of adults in Louisiana who pray…
| Belief in God | At least daily | Weekly | Monthly | Seldom/never | Don't know | Sample size |
|---|---|---|---|---|---|---|
| Believe in God; absolutely certain | 81% | 13% | 1% | 4% | < 1% | 342 |
Sample sizes and margins of error vary from subgroup to subgroup, from year to year and from state to state. You can see the sample size for the estimates in this chart on rollover or in the last column of the table. And visit this table to see approximate margins of error for a group of a given size. Readers should always bear in mind the approximate margin of error for the group they are examining when making comparisons with other groups or assessing the significance of trends over time. For full question wording, see the survey questionnaire.
Switch Display To: belief in God among adults in Louisiana by frequency of prayer
Frequency of participation in prayer, scripture study or religious education groups among adults in Louisiana by belief in God
% of adults in Louisiana who attend prayer group…
| Belief in God | At least once a week | Once or twice a month | Several times a year | Seldom/never | Don't know | Sample size |
|---|---|---|---|---|---|---|
| Believe in God; absolutely certain | 42% | 16% | 10% | 33% | < 1% | 342 |
Sample sizes and margins of error vary from subgroup to subgroup, from year to year and from state to state. You can see the sample size for the estimates in this chart on rollover or in the last column of the table. And visit this table to see approximate margins of error for a group of a given size. Readers should always bear in mind the approximate margin of error for the group they are examining when making comparisons with other groups or assessing the significance of trends over time. For full question wording, see the survey questionnaire.
Switch Display To: belief in God among adults in Louisiana by attendance at prayer groups
Frequency of meditation among adults in Louisiana by belief in God
% of adults in Louisiana who meditate…
| Belief in God | At least once a week | Once or twice a month | Several times a year | Seldom/never | Don't know | Sample size |
|---|---|---|---|---|---|---|
| Believe in God; absolutely certain | 53% | 5% | 2% | 39% | 1% | 342 |
Sample sizes and margins of error vary from subgroup to subgroup, from year to year and from state to state. You can see the sample size for the estimates in this chart on rollover or in the last column of the table. And visit this table to see approximate margins of error for a group of a given size. Readers should always bear in mind the approximate margin of error for the group they are examining when making comparisons with other groups or assessing the significance of trends over time. For full question wording, see the survey questionnaire.
Switch Display To: belief in God among adults in Louisiana by frequency of meditation
Frequency of feeling spiritual peace and wellbeing among adults in Louisiana by belief in God
% of adults in Louisiana who feel a sense of spiritual peace and wellbeing…
| Belief in God | At least once a week | Once or twice a month | Several times a year | Seldom/never | Don't know | Sample size |
|---|---|---|---|---|---|---|
| Believe in God; absolutely certain | 75% | 13% | 5% | 6% | < 1% | 342 |
Sample sizes and margins of error vary from subgroup to subgroup, from year to year and from state to state. You can see the sample size for the estimates in this chart on rollover or in the last column of the table. And visit this table to see approximate margins of error for a group of a given size. Readers should always bear in mind the approximate margin of error for the group they are examining when making comparisons with other groups or assessing the significance of trends over time. For full question wording, see the survey questionnaire.
Frequency of feeling wonder about the universe among adults in Louisiana by belief in God
% of adults in Louisiana who feel a sense of wonder about the universe…
| Belief in God | At least once a week | Once or twice a month | Several times a year | Seldom/never | Don't know | Sample size |
|---|---|---|---|---|---|---|
| Believe in God; absolutely certain | 41% | 14% | 13% | 29% | 3% | 342 |
Sample sizes and margins of error vary from subgroup to subgroup, from year to year and from state to state. You can see the sample size for the estimates in this chart on rollover or in the last column of the table. And visit this table to see approximate margins of error for a group of a given size. Readers should always bear in mind the approximate margin of error for the group they are examining when making comparisons with other groups or assessing the significance of trends over time. For full question wording, see the survey questionnaire.
Sources of guidance on right and wrong among adults in Louisiana by belief in God
% of adults in Louisiana who say they look to…most for guidance on right and wrong
| Belief in God | Religion | Philosophy/reason | Common sense | Science | Don't know | Sample size |
|---|---|---|---|---|---|---|
| Believe in God; absolutely certain | 51% | 7% | 38% | 2% | 2% | 342 |
Sample sizes and margins of error vary from subgroup to subgroup, from year to year and from state to state. You can see the sample size for the estimates in this chart on rollover or in the last column of the table. And visit this table to see approximate margins of error for a group of a given size. Readers should always bear in mind the approximate margin of error for the group they are examining when making comparisons with other groups or assessing the significance of trends over time. For full question wording, see the survey questionnaire.
Belief in absolute standards for right and wrong among adults in Louisiana by belief in God
% of adults in Louisiana who say…
| Belief in God | There are clear standards for what is right and wrong | Right or wrong depends on the situation | Neither/both equally | Don't know | Sample size |
|---|---|---|---|---|---|
| Believe in God; absolutely certain | 41% | 57% | 1% | 1% | 342 |
Sample sizes and margins of error vary from subgroup to subgroup, from year to year and from state to state. You can see the sample size for the estimates in this chart on rollover or in the last column of the table. And visit this table to see approximate margins of error for a group of a given size. Readers should always bear in mind the approximate margin of error for the group they are examining when making comparisons with other groups or assessing the significance of trends over time. For full question wording, see the survey questionnaire.
Frequency of reading scripture among adults in Louisiana by belief in God
% of adults in Louisiana who read scripture…
| Belief in God | At least once a week | Once or twice a month | Several times a year | Seldom/never | Don't know | Sample size |
|---|---|---|---|---|---|---|
| Believe in God; absolutely certain | 58% | 13% | 7% | 20% | 1% | 342 |
Sample sizes and margins of error vary from subgroup to subgroup, from year to year and from state to state. You can see the sample size for the estimates in this chart on rollover or in the last column of the table. And visit this table to see approximate margins of error for a group of a given size. Readers should always bear in mind the approximate margin of error for the group they are examining when making comparisons with other groups or assessing the significance of trends over time. For full question wording, see the survey questionnaire.
Switch Display To: belief in God among adults in Louisiana by frequency of reading scripture
Interpreting scripture among adults in Louisiana by belief in God
% of adults in Louisiana who say the holy scripture is…
| Belief in God | Word of God; should be taken literally | Word of God; not everything taken literally | Word of God; other/don't know | Not the word of God | Other/don't know | Sample size |
|---|---|---|---|---|---|---|
| Believe in God; absolutely certain | 55% | 30% | 3% | 8% | 4% | 342 |
Sample sizes and margins of error vary from subgroup to subgroup, from year to year and from state to state. You can see the sample size for the estimates in this chart on rollover or in the last column of the table. And visit this table to see approximate margins of error for a group of a given size. Readers should always bear in mind the approximate margin of error for the group they are examining when making comparisons with other groups or assessing the significance of trends over time. For full question wording, see the survey questionnaire.
Switch Display To: belief in God among adults in Louisiana by interpretation of scripture
Belief in Heaven among adults in Louisiana by belief in God
% of adults in Louisiana who …in heaven
| Belief in God | Believe | Don't believe | Other/don't know | Sample size |
|---|---|---|---|---|
| Believe in God; absolutely certain | 92% | 4% | 4% | 342 |
Sample sizes and margins of error vary from subgroup to subgroup, from year to year and from state to state. You can see the sample size for the estimates in this chart on rollover or in the last column of the table. And visit this table to see approximate margins of error for a group of a given size. Readers should always bear in mind the approximate margin of error for the group they are examining when making comparisons with other groups or assessing the significance of trends over time. For full question wording, see the survey questionnaire.
Switch Display To: belief in God among adults in Louisiana by belief in heaven
Belief in Hell among adults in Louisiana by belief in God
% of adults in Louisiana who …in hell
| Belief in God | Believe | Don't believe | Other/don't know | Sample size |
|---|---|---|---|---|
| Believe in God; absolutely certain | 81% | 13% | 6% | 342 |
Sample sizes and margins of error vary from subgroup to subgroup, from year to year and from state to state. You can see the sample size for the estimates in this chart on rollover or in the last column of the table. And visit this table to see approximate margins of error for a group of a given size. Readers should always bear in mind the approximate margin of error for the group they are examining when making comparisons with other groups or assessing the significance of trends over time. For full question wording, see the survey questionnaire.
Switch Display To: belief in God among adults in Louisiana by belief in hell
Social✭and✭Political✭Views
Party affiliation among adults in Louisiana by belief in God
% of adults in Louisiana who identify as…
| Belief in God | Republican/lean Rep. | No lean | Democrat/lean Dem. | Sample size |
|---|---|---|---|---|
| Believe in God; absolutely certain | 42% | 13% | 45% | 342 |
Sample sizes and margins of error vary from subgroup to subgroup, from year to year and from state to state. You can see the sample size for the estimates in this chart on rollover or in the last column of the table. And visit this table to see approximate margins of error for a group of a given size. Readers should always bear in mind the approximate margin of error for the group they are examining when making comparisons with other groups or assessing the significance of trends over time. For full question wording, see the survey questionnaire.
Switch Display To: belief in God among adults in Louisiana by political party
Political ideology among adults in Louisiana by belief in God
% of adults in Louisiana who are…
| Belief in God | Conservative | Moderate | Liberal | Don't know | Sample size |
|---|---|---|---|---|---|
| Believe in God; absolutely certain | 54% | 28% | 11% | 6% | 342 |
Sample sizes and margins of error vary from subgroup to subgroup, from year to year and from state to state. You can see the sample size for the estimates in this chart on rollover or in the last column of the table. And visit this table to see approximate margins of error for a group of a given size. Readers should always bear in mind the approximate margin of error for the group they are examining when making comparisons with other groups or assessing the significance of trends over time. For full question wording, see the survey questionnaire.
Switch Display To: belief in God among adults in Louisiana by political ideology
Views about size of government among adults in Louisiana by belief in God
% of adults in Louisiana who would rather have…
| Belief in God | Smaller government; fewer services | Bigger government; more services | Depends | Don't know | Sample size |
|---|---|---|---|---|---|
| Believe in God; absolutely certain | 52% | 43% | 3% | 3% | 342 |
Sample sizes and margins of error vary from subgroup to subgroup, from year to year and from state to state. You can see the sample size for the estimates in this chart on rollover or in the last column of the table. And visit this table to see approximate margins of error for a group of a given size. Readers should always bear in mind the approximate margin of error for the group they are examining when making comparisons with other groups or assessing the significance of trends over time. For full question wording, see the survey questionnaire.
Switch Display To: belief in God among adults in Louisiana by views about size of government
Views about government aid to the poor among adults in Louisiana by belief in God
% of adults in Louisiana who say government aid to the poor…
| Belief in God | Does more harm than good | Does more good than harm | Neither/both equally | Don't know | Sample size |
|---|---|---|---|---|---|
| Believe in God; absolutely certain | 50% | 43% | 3% | 4% | 342 |
Sample sizes and margins of error vary from subgroup to subgroup, from year to year and from state to state. You can see the sample size for the estimates in this chart on rollover or in the last column of the table. And visit this table to see approximate margins of error for a group of a given size. Readers should always bear in mind the approximate margin of error for the group they are examining when making comparisons with other groups or assessing the significance of trends over time. For full question wording, see the survey questionnaire.
Views about abortion among adults in Louisiana by belief in God
% of adults in Louisiana who say abortion should be…
| Belief in God | Legal in all/most cases | Illegal in all/most cases | Don't know | Sample size |
|---|---|---|---|---|
| Believe in God; absolutely certain | 31% | 65% | 4% | 342 |
Sample sizes and margins of error vary from subgroup to subgroup, from year to year and from state to state. You can see the sample size for the estimates in this chart on rollover or in the last column of the table. And visit this table to see approximate margins of error for a group of a given size. Readers should always bear in mind the approximate margin of error for the group they are examining when making comparisons with other groups or assessing the significance of trends over time. For full question wording, see the survey questionnaire.
Switch Display To: belief in God among adults in Louisiana by views about abortion
Views about homosexuality among adults in Louisiana by belief in God
% of adults in Louisiana who say homosexuality…
| Belief in God | Should be accepted | Should be discouraged | Neither/both equally | Don't know | Sample size |
|---|---|---|---|---|---|
| Believe in God; absolutely certain | 46% | 42% | 7% | 5% | 342 |
Sample sizes and margins of error vary from subgroup to subgroup, from year to year and from state to state. You can see the sample size for the estimates in this chart on rollover or in the last column of the table. And visit this table to see approximate margins of error for a group of a given size. Readers should always bear in mind the approximate margin of error for the group they are examining when making comparisons with other groups or assessing the significance of trends over time. For full question wording, see the survey questionnaire.
Switch Display To: belief in God among adults in Louisiana by views about homosexuality
Views about same-sex marriage among adults in Louisiana by belief in God
% of adults in Louisiana who …same-sex marriage
| Belief in God | Strongly favor/favor | Oppose/strongly oppose | Don't know | Sample size |
|---|---|---|---|---|
| Believe in God; absolutely certain | 32% | 60% | 8% | 342 |
Sample sizes and margins of error vary from subgroup to subgroup, from year to year and from state to state. You can see the sample size for the estimates in this chart on rollover or in the last column of the table. And visit this table to see approximate margins of error for a group of a given size. Readers should always bear in mind the approximate margin of error for the group they are examining when making comparisons with other groups or assessing the significance of trends over time. For full question wording, see the survey questionnaire.
Switch Display To: belief in God among adults in Louisiana by views about same-sex marriage
Views about environmental regulation among adults in Louisiana by belief in God
% of adults in Louisiana who say…
| Belief in God | Stricter environmental laws and regulations cost too many jobs and hurt the economy | Stricter environmental laws and regulations are worth the cost | Neither/both equally | Don't know | Sample size |
|---|---|---|---|---|---|
| Believe in God; absolutely certain | 46% | 48% | 2% | 4% | 342 |
Sample sizes and margins of error vary from subgroup to subgroup, from year to year and from state to state. You can see the sample size for the estimates in this chart on rollover or in the last column of the table. And visit this table to see approximate margins of error for a group of a given size. Readers should always bear in mind the approximate margin of error for the group they are examining when making comparisons with other groups or assessing the significance of trends over time. For full question wording, see the survey questionnaire.
Views about human evolution among adults in Louisiana by belief in God
% of adults in Louisiana who say humans…
| Belief in God | Evolved; due to natural processes | Evolved; due to God's design | Evolved; don't know how | Always existed in present form | Don't know | Sample size |
|---|---|---|---|---|---|---|
| Believe in God; absolutely certain | 12% | 30% | 2% | 49% | 7% | 342 |
Sample sizes and margins of error vary from subgroup to subgroup, from year to year and from state to state. You can see the sample size for the estimates in this chart on rollover or in the last column of the table. And visit this table to see approximate margins of error for a group of a given size. Readers should always bear in mind the approximate margin of error for the group they are examining when making comparisons with other groups or assessing the significance of trends over time. For full question wording, see the survey questionnaire.
Switch Display To: belief in God among adults in Louisiana by views about human evolution
