For an excellent discussion of the real story of Thanksgiving see go here. The central point is this:
"The original contract the Pilgrims had entered into with their merchant-sponsors in London called for everything they produced to go into a common store, and each member of the community was entitled to one common share. All of the land they cleared and the houses they built belong to the community as well. Bradford, who had become the new governor of the colony, recognized that this form of collectivism was as costly and destructive to the Pilgrims as that first harsh winter, which had taken so many lives. He decided to take bold action. Bradford assigned a plot of land to each family to work and manage, thus turning loose the power of the marketplace. That's right. Long before Karl Marx was even born, the Pilgrims had discovered and experimented with what could only be described as socialism. And what happened? It didn't work!?