On gay marriage, the U.S. has turned onto the road not taken on abortion.
the early 1970s, states went their separate ways on abortion, with some
legalizing it and others reaffirming long-standing bans. The nation,
for better or worse, appeared headed for a patchwork of laws that
reflected the political balance in the different states—until the
Supreme Court preempted the process in 1973 by establishing a national
right to abortion in its landmark Roe v. Wade decision.
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