"Much of ancient history is anchored in Egyptian chronology that is notoriously ambiguous and imprecise and creates problems for all kinds of historical anchoring of events. Donovan Courville in the 1970s, and more recently David Rohl, has explored the Egyptian problems to offer a "New Chronology" of the ancient world that roots Biblical history in new contexts significantly different from the conventional chronology.[3] They too have shaken up the establishment by uncovering the significant chronological problems of the conventional view. In more recent years, Gerald Aardsma, has offered the Biblical theory that the Exodus occurred in 2450 B.C., nearly one thousand years earlier than the conventional dates of 1445 B.C. or 1225 B.C.[4] This would place Abraham in Mesopotamia around 3000 B.C. instead of 2000 B.C. A radical reconsideration."