CONTENIDO: Prologue : a tale of two farms -- Modern Montana -- Under Montana's big sky -- Past societies -- Twilight at Easter -- The last people alive : Pitcairn and Henderson Islands -- The ancient ones : the Anasazi and their neighbors -- The Maya collapses -- The Viking prelude and fugues -- Norse Greenland's flowering -- Norse Greenland's end -- Opposite paths to success -- Modern societies -- Malthus in Africa : Rwanda's genocide -- One Island, two peoples, two histories : the Dominican Republic and Haiti -- China, lurching giant -- "Mining" Australia -- Practical lessons -- Why do some societies make disastrous decisions? -- Big businesses and the environment : different conditions, different outcomes -- The world as a polder : what does it all mean to us today?.