The American public has become more tolerant on a number of moral issues, including premarital sex, embryonic stem cell research, and euthanasia. On a list of 19 major moral issues of the day, Americans express levels of moral acceptance that are as high or higher than in the past on 12 of them, a group that also encompasses social mores such as polygamy, having a child out of wedlock, and divorce.

What Gallup didn’t provide in this post—and what would be informative to see—is a trend line on how views on these issues have changed over time. The title of the post says they are record highs, but there’s not much details about how much higher the percentages of moral acceptability the respondents reported. Overall, I’d expect to see views on most of these issues becoming increasingly morally acceptable. But I wonder if any of these issues have become more taboo over time?