The Anasazi people of the American Southwest who lived in the region are the ancestors of modern Pueblo Indians.From about 2000 B.C. to 1000 B.C., they made a transition from a nomadic hunter-gatherer existence to establish settlements and early agricultural efforts, <A HREF="http://dailynews.yahoo.com/h/nm/20011004/sc/science_stalagmites_dc_1.html">Click here: Climate Drove Southwest Native Cultural Changes</A>