U.S. Immigration Policy, Ethnicity, and Religion in American History is rich with data and document excerpts that illuminate the complex relationships among ethnicity, religion, and immigration to the United States over a 200-year period.

The book uniquely organizes the flow of immigration to the United States into seven chapters covering U.S. immigration policy making; the Open Door Era, 1820–1880; the Door Ajar Era, 1880–1920; the Pet Door Era, 1920–1950; the Dutch Door Era, 1950–1985; the Revolving Door Era, 1985–2001; and the Storm Door Era, 2001–2018. Each chapter analyzes trends in ethnicity or national origin and the religious affiliations of immigrant groups in relation to immigration policy during the time period covered.