Roe V. Wade, the famous 1973 U.S. Supreme Court decision that legalize abortion for all American women, is certainly one of the most and important Supreme Court decision in American history. Because whatever your opinion on abortion, whether you believe in women's right to choose as I do as long as taxpayers aren't paying for that choice other than to save the health or life of the mother, or you believe abortion should be illegal, this is one of the most important and also divisive decisions. And put Americans on different sides and one of the first battles in the Culture War in America.
I'm not sure we have a Religious-Right and a neoconservative movement without Roe V. Wade. That movement still happens because there would've been some response in a big way to the Culture Revolution of the 1960s from the Right especially Far-Right that freed millions of Americans to be able to live their own lives and become part of American mainstream society. But Roe V. Wade was one of their biggest weapons and tools for fundraising and helped these religious and cultural groups on the Right have the resources to make their argument against abortion and other social issues.