Native Americans had a spiritual vision of Nature and could not conceive land ownership as something respectable. European forced the Natives to adapt gradually to their notion of private property and land ownership
The Native Americans believed that nobody owned the land. Instead, they believed the land belonged to everybody within their tribe. The Europeans, on the other hand, believed that people had a right to own land. They believed people could buy land, which would then belong to the individual.
Native Americans had a spiritual vision of Nature and could not conceive land ownership as something respectable. European forced the Natives to adapt gradually to their notion of private property and land ownership.
"c. massive movements of religious reformation" would not be considered a prevalent theme of the era 1968 to present since religions have not changed that much.