It's time for Future History: sociologist Robert L. Carneiro, of the American Museum of Natural History and Columbia University, both in New York, returns to IDN this week to expand on his views of the future of dispute resolution. In examining nation states as a source of conflicts, Carneiro, AMNH's Curator of South American Ethnology, looks back on 3,500 years and sees "an irresistible trend for the number of political units" to decrease, and for their size to increase. Carneiro tells host Michael McIlwrath how long it will take for the world’s 193 autonomous political units--down from half a million such units in 1500 B.C.—to merge into one, nearly conflict-free world government, and how increasing jobs' specialization fits into the picture.