The Human Genome Diversity Project tells us that between 15,000 and 30,000 years ago people from Mongolia crossed Beringia to what we now call the Americas. U.S. Immigration and Migration chronicles and interprets the phenomenal waves of immigration to the United States from the earliest times through the period from 1820 to 1930, when the United States was the destination of some 60% of the world’s immigrants – up to the present day, when restrictive policies have temporarily stanched the flow of immigrants. Insights into the movement of people are provided in the Primary Sources volume via excerpts from such key documents as the Maryland Toleration Act (1649), the Treaty of Fort Stanwix (1784), the Homestead Act (1862), the Chinese Exclusion Act (1882), and the Immigration Act (1924), as well as personal observations from two Mexican immigrants and concerns about the rise in U.S. immigration from conservative talk-show host Patrick J. Buchanan.