1) The American heartland is more traditional and conservative than Western Europe. 2) Non-whites, making up almost 40 % of the USA, generally get married earlier, especially first-generation immigrants. ---------- Post added 2010-09-28 at 15:25 ---------- This could also be a factor; housing in the United States is probably much more affordable than in densely populated Western Europe. ---------- Post added 2010-09-28 at 15:27 ---------- Um, isn't it the other way around? Highly educated people usually get married later in life.