One historian writes that most in Congress believed the Endangered Species Act was “a largely symbolic effort” to protect only the kinds of species environmentalists call “charismatic megafauna”—grizzlies, whales, bald eagles, and other large, beautiful species that people tend to feel an easy connection with. But the act had been quietly beefed up by idealistic staffers, and was much further-reaching and more powerful than most congressmen took the time to understand. After its passage, there was instantly a lot of buyer’s remorse. (In a famous example, a small fish called the snail darter
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