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Further evidence, like we needed it, that our civilization is on an inexorable downward slide: The most intelligent among us are apparently less likely to have lots of children than the personalities known as "Type A"—those bossy, overbearing, ambitious types who push everyone out of their way. While there used to be an obvious link between men's wealth and their, um, procreativity, new research by evolutionary psychologists suggests that "leadership qualities like taking charge and being competitive have an evolutionary advantage even if high socioeconomic status no longer does." Basically, overconfident, pushy people get laid a lot, while polite, unassuming nerds stay home alone and Twitter about Battlestar Galactica.