In much of the world, small farmers raise food and support themselves and their families in a way of life that has existed for centuries. In many places, large tracts of land are held in common, used jointly by all the small farmers in the area. But times are changing. Trade agreements, changes in government policy, and privatization are all making subsistence farming no longer viable. Communal lands are being lost. Poor countries are growing food for export abroad and no longer growing food to feed their own people.