"Our own planet, in which philosophers are apt to take a parochial and excessive interest, was once too hot to support life, and will in time be too cold. After ages during which the earth produced harmless trilobites and butterflies, evolution progressed to the point at which it generated Neros, Ghenghis Khans, and Hitlers. This, however, is a passing nightmare; in time the earth will become again incapable of supporting life, and peace will return."-- Bertrand Russell