The rule of nature was supposed to supplant artificial aristocracy with meritocracy. At the same time, though, it allowed people to associate human failures with different strains and inferior breeds, and to assign a certain inevitability to such failure. If, in this long-acceptable way of thinking, nature ruled, nature also needed a gardener. The human scrub grass had to be weeded from time to time. That is why squatters were used as the first wave of settlers to encroach on Indian lands, then were chased off the land when the upscale farmers arrived; in time, policing boundaries extended to
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