Thanksgiving may be over. But it's not too late to learn one of the less-appreciated lessons of the First Thanksgiving back in 1621. As economist Benjamin Powell explains, the Pilgrims were saved from starvation because they replaced collectivism with private property rights:
Many people believe that after suffering through a severe winter, the Pilgrims' food shortages were resolved the following spring when the Native Americans taught them to plant corn and a Thanksgiving celebration resulted. In fact, the pilgrims continued to face chronic food shortages for three years until the harvest of 1623. Bad weather or lack of farming knowledge did not cause the pilgrims' shortages. Bad economic incentives did.
In 1620 Plymouth Plantation was founded with a system of communal property rights. Food and supplies were held in common and then distributed based on equality and need as determined by Plantation officials. People received the same rations whether or not they contributed to producing the food, and residents were forbidden from producing their own food. Governor William Bradford, in his 1647 history, Of Plymouth Plantation, wrote that this system was found to breed much confusion and discontent and retard much employment that would have been to their benefit and comfort. The problem was that young men, that were most able and fit for labour, did repine that they should spend their time and strength to work for other men's wives and children without any recompense. Because of the poor incentives, little food was produced.
Faced with potential starvation in the spring of 1623, the colony decided to implement a new economic system. Every family was assigned a private parcel of land. They could then keep all they grew for themselves, but now they alone were responsible for feeding themselves. While not a complete private property system, the move away from communal ownership had dramatic results.
This change, Bradford wrote, had very good success, for it made all hands very industrious, so as much more corn was planted than otherwise would have been. Giving people economic incentives changed their behavior. Once the new system of property rights was in place, the women now went willingly into the field, and took their little ones with them to set corn; which before would allege weakness and inability.
Once the Pilgrims in the Plymouth Plantation abandoned their communal economic system and adopted one with greater individual property rights, they never again faced the starvation and food shortages of the first three years. It was only after allowing greater property rights that they could feast without worrying that famine was just around the corner.
UPDATE: It's worth noting that, contrary to some modern mythology, Native American tribes that relied on agriculture also usually used private property rights to stimulate production. Claims that native peoples were opposed to private property rights or had no conception of such a thing until the Europeans came, are for the most part PC myths.
UPDATE #2: For a more detailed account of the role of property rights in saving the Pilgrims, see this 1999 article by Tom Bethell.