alongside any slaves they owned. Ownership of large numbers of slaves made the work of planters completely managerial. Minorities African Americans The study of slavery as a social and economic system dates from Ulrich B. Phillips in the early 20th century. He argued that plantation slavery was a school for civilizing the blacks, albeit one that produced no graduates. His favoritism toward the slave owners was finally challenged by neoabolitionist historians in the 1950s, most notably Kenneth Stampp. Since the 1960s a large literature has emerged on the social structure of the slave system, especially on such topics as family life, gender roles, resistance to slavery, and demographic trends. The study of free blacks has been slower to emerge because of the shortage of records, but historians have been filling in the picture North and South with studies of free black urban communities, and their religious and political leaders. The post-slavery era has been dominated by political studies, especially of Reconstruction and Jim Crow. The black churches were not only a political force, but became central to the black community in both urban and rural areas. The emergence of a black musical culture has been linked both to slavery (as in the Blues), and to church music. Asian Americans Asian Americans had small communities in New York City before 1860. Their greatest growth came on the Pacific Coast, during the Gold Rush and railroad booms of the 1860s. The Chinese who remained in America were violently driven out of the mining and railroad camps, and largely forced into Chinatowns in the larger cities, especially San Francisco. The Chinese exclusion laws of the 1880s created special legal problems, which numerous have explored. The Chinatowns were over 90% male, augmented by a trickle of immigration, and slowly shrank in size until 1940. Local and national attitudes became much more favorable to the Chinese after 1940, largely because of American support for China in World War II. Japanese immigration was a major factor in the history of Hawaii, and after its annexation in 1898 large numbers moved to the West Coast. Anti-Japanese hostility was strong down to 1941, when it intensified and most Japanese on the West Coast were sent to relocation camps, 1942–44. After 1945 the trickle of immigration from the Philippines, India and Korea grew steadily, creating large communities on the West Coast. Hispanics In 1848 after the Mexican–American War, the