These things _did_ occur, but they are not the cause of the demise of the Native American. The mere _arrival_ of Europeans, who carried diseases to which Nati

These things _did_ occur, but they are not the cause of the demise of the Native American. The mere _arrival_ of Europeans, who carried diseases to which Native Americans were not immune, doomed them. These diseases were rapidly spread to any who traded with Europeans and thence to the innermost regions of North (and South) America. Most Native Americans died of transmitted European diseases long before they had any any opportunity to glimpse a "white man". The Native Americans were so decimated by the time of the massacres and reservations that entire tribes had to migrate and merge, losing their unique identities, in order to merely survive.