QUOTE : In our twenty-first century world, the terms "genocide" and "ethnic cleansing" sit uneasily in the mind, associated with some of our darkest and most disturbing thoughts about human nature. They conjure Darfur, Serbia, Cambodia, and Pol Pot, and, most vividly of all for many of us, the horrors in Europe before and during World War II. "Species cleansing," on the other hand, is not a term that falls readily to hand, although we have engaged in it without much remorse for at least 10,000 years and probably more. Be it North American mammoths, driven to annihilation ten millennia ago by bands of a near-professional hunting culture known as Clovis ... to passenger pigeons and ivory-billed woodpeckers ... in twentieth century America, humans are ancient veterans of the art of species cleansing, ...