By today's politically polarized standards, the Supreme Court's momentous Roe v. Wade ruling was a landslide. By a 7-2 vote
on Jan. 22, 1973, the justices established a nationwide right to abortion.
Forty years and roughly 55 million abortions later, however, the ruling's legacy is the opposite of consensus. Abortion ranks as one of the most intractably divisive issues in America and is likely to remain so as rival camps of true believers see little space for common ground.