According to the PRRI survey, 57 percent of 18-to-29-year-olds favor same-sex marriage — the only age cohort in which gay marriage has majority support. Another 19 percent of millennials support letting gays form civil unions. By contrast, gay marriage is favored by 42 percent of people ages 30 to 49, 32 percent of those ages 50 to 64, and 26 percent of seniors 65 and older…

Some 60 percent of millennials interviewed said they thought abortion should be legal in most or all cases, almost exactly the same share as the rest of country younger than 65. Only among people 65 and older was there a significant difference, with just 43 percent thinking abortion should be generally legal.

Similar findings — major generational gaps on homosexuality, less so on abortion — came up when the question were phrased not in legal terms but about the morality of abortion and gay sex.