A new Pew Research Center survey finds high levels of concern about religious extremism among Muslims living in the North Caucasus area of Russia and the neighboring Central Asian countries of Kyrgyzstan and Kazakhstan. It also finds that most Muslims in the region reject violence against civilians.

When Benedict XVI was elected pope in 2005, religious observance among Europeans had been in decline for decades, and he set out to stem the tide of secularization. How successful was he? Pew Research polls indicate that during his papacy, religious observance among Catholics in France, Germany, Spain and Italy remained low but fairly stable.

Over the past century, the number of Catholics worldwide has more than tripled. But the world’s overall population also has risen rapidly from 1910 to 2010. As a result, Catholics have made up a remarkably stable share of all people on Earth, though their geographic distribution has changed substantially.

Updated May 20, 2013. A fact sheet provides an overview of the situation in the nations where same-sex marriage is legal nationwide as well as countries that allow it in certain jurisdictions.

A country-by-country analysis of data from more than 2,500 censuses, surveys and population registers finds that 84% of adults and children around the globe are religiously affiliated. The study also finds that the median age of two major groups – Muslims (23 years) and Hindus (26) – is younger than the world’s overall population (28), while Jews have the highest median age (36).

On Nov. 20, a Pakistani court ordered blasphemy charges dropped against a Christian teenager who had been accused of burning pages from the Quran. A new Pew Forum analysis finds that as of 2011 nearly half the countries and territories in the world have laws against blasphemy, apostasy or defamation. 

Between mid-2009 and mid-2010, religious restrictions rose not only in countries that began the year with high or very high restrictions, such as Indonesia and Nigeria, but also in many countries that began with low or moderate restrictions, such as Switzerland and the United States. The report looks at restrictions due to government actions as well as acts of violence and intimidation by private individuals, organizations and social groups.