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 segregation laws, and after that to zoning laws, separating the wheat from the chaff in the creation of modern suburbia. Class walls went up in the way property values were modulated in carefully planned towns and neighborhoods.
