Social Medicine: A branch of medicine concerned with the role of socio-environmental factors in the occurrence, prevention and treatment of disease.Colonialism: The aggregate of various economic, political, and social policies by which an imperial power maintains or extends its control over other areas or peoples. It includes the practice of or belief in acquiring and retaining colonies. The emphasis is less on its identity as an ideological political system than on its designation in a period of history. (Webster, 3d ed; from Dr. J. Cassedy, NLM History of Medicine Division)Latin America: The geographic area of Latin America in general and when the specific country or countries are not indicated. It usually includes Central America, South America, Mexico, and the islands of the Caribbean.Social Justice: An interactive process whereby members of a community are concerned for the equality and rights of all.History, 20th Century: Time period from 1901 through 2000 of the common era.Politics: Activities concerned with governmental policies, functions, etc.History, 19th Century: Time period from 1801 through 1900 of the common era.Public Health Practice: The activities and endeavors of the public health services in a community on any level.Social Behavior: Any behavior caused by or affecting another individual, usually of the same species.Social Support: Support systems that provide assistance and encouragement to individuals with physical or emotional disabilities in order that they may better cope. Informal social support is usually provided by friends, relatives, or peers, while formal assistance is provided by churches, groups, etc.