Polygamy, it seems, is going to be the next culture wars threshold to be crossed.
Americans today appear to have greater comfort with a host of issues or behaviors that were at one time subject to social stigma. And even among the most taboo behaviors, there is evidence of changing moral judgments, at least in relation to suicide, cloning humans and polygamy. […] Why these items are seeing a modest improvement on their perceived morality is hard to determine, though the disproportionately high share of 18- to 29-year-olds labeling them as acceptable may be both telling and predictive. Young adults find just one behavior — affairs between married men and women — highly unacceptable. Provided younger Americans do not shift toward a more culturally conservative stance as they age — and there is reason to believe they won’t, given the increasingly liberal views of older Americans — fewer behaviors may eventually be seen as taboo.