> When we note that acceptance of gays has become mainstream or that smoking has decreased or that people get married later, we don't presume that it has to do

> When we note that acceptance of gays has become mainstream or that smoking has decreased or that people get married later, we don't presume that it has to do with abortion rates or leaded gasoline -- we just understand that cultural shifts happen. We absolutely try to discover the causes of those shifts. There are similar articles about why those things are happening, too, in each case!