Immigration played a key role not only in making America's development possible but also in shaping the basic nature of the society. Tens of millions of immigrants over four centuries have made the United States what it is today. Its history falls into five distinct time periods, each of which involved varying rates of migration from distinctly different places in the world. Each reflected, and also shaped, much about the basic nature of American society and economy. This title will help students determine an author's point of view or purpose in a text and analyze how the author acknowledges and responds to conflicting evidence or viewpoints.