Pot legalization. As Colorado and Washington state begin selling legal weed, fully 58 percent of Americans believe the drug should be legal. That’s up from just 12 percent in 1969, says Gallup.

Abortion. Few issues are as hotly contested and few issues have generated such consistent support, with 78 percent of us thinking abortion should be legal under either all or some circumstances, and just 20 percent thinking it should be illegal in all circumstances. Those numbers basically haven’t changed since 1975.

Homosexuality. In 2001, just 40 percent of Americans thought that that “gay or lesbian relations” were morally acceptable. Last year, 59 percent had no problem with them. And 53 percent now think same-sex marriage should be given equal status to conventional couplings. That’s up almost 20 points from the start of the century.