Special organizations exist today to prevent any total collapses in food distribution, assist in developing food distribution and food systems in underdeveloped areas, and respond to food distribution crises. At the international level, the Food and Agriculture Organization (FAO) plays a key role in facilitating the growth of food distribution systems all over the world. At the national level different countries have developed more complex support systems; by example, a mixture of federal, non-profit, and volunteer organizations function in the United States to safeguard the well-being of the US food distribution system.