The Law of Least Effort IN HIS AWARD-WINNING BOOK, Guns, Germs, and Steel, anthropologist and biologist Jared Diamond points out a simple fact: different continents have different shapes. At first glance, this statement seems rather obvious and unimportant, but it turns out to have a profound impact on human behavior. The primary axis of the Americas runs from north to south. That is, the landmass of North and South America tends to be tall and thin rather than wide and fat. The same is generally true for Africa. Meanwhile, the landmass that makes up Europe, Asia, and the Middle East is the
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