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.
Features include 150 black-and-white photographs, including about 10 maps; chronology; sidebars; words to know; research and activity ideas; further reading; and a subject index. The "Almanac" volumes tell of the economic, religious and political forces that compelled people to seek a better life in a new land. These same forces later inspired the migration of many Americans to other areas in mass movements such as the Westward Expansion; the rural to urban migration; the Great Migration of blacks in the early part of the 20th century; and the migration to the Sunbelt starting in the 1960s.