" Perhaps the belief that the Indians were destined to vanish originated in early colonial times as a means of justifying the massacres of Indians by the Puritans. If, as the New England colonists believed, Indians were under a cosmic curse and in a state of rapid decline, killing a few was not really a criminal act and in some instances might actually be doing the Lord’s work. It was not all Thanksgiving dinners in those early days. No one questions that the Indian population in the East did decline precipitiously as whites settled the New England area. Many Indians were killed, others hid in obscure places, and still other Indians moved west before the American Revolution. Many eastern Indians were allies of Great Britain in both the Revolution and the War of 1812. Believing they should not stay behind in the United States when their English friends fled to Canada after the Revolution, they left with the departing British troops, vanishing from the United States but remaining very much a part of things north of the border. The virtual disappearance of Indians east of the Mississippi can be traced directly to Andrew Jackson’s policy of removing the tribes of that region to Oklahoma and Kansas, not to some cosmic decree commanding their inevitable extinction. Even then only the largest and most threatening tribes were removed. Smaller tribal groups simply remained in the backwaters of the eastern United States where they had always lived. "
― Vine Deloria Jr. , Spirit and Reason: The Vine Deloria, Jr. Reader