Bill James once said that, when politics is functioning well, elections should have razor thin margins. The reason is that the parties will align themselves to best exploit divisions in the electorate. If one party is only getting 40% of the vote, they will quickly re-align to get higher vote totals. The other party will respond and they will reach a natural equilibrium near 50% I think that is the missing key to understanding why so many governments are divided. The Information Age has not only given political parties more information to align themselves with the electorate, it has made the electorate more responsive. The South was utterly loyal the Democrats for 120 years. Nowadays, that kind of political loyalty is fading.
I love this piece about how an accepted piece of sociology turned out to be complete gobbledygook.
Speaking of gobbledygook, here is a review of the article about men ogling women. It sounds like the authors misquoted their own study.