The field of immigration and ethnic history has changed over the years to include previously neglected topics such as gender and race as well as newer immigrant groups. This Handbook introduction lays out the book’s focus and suggests that many new questions in regard to assimilation, nativism, group identity, panethnicity, and ethnic succession, among others, can be asked to help clarify and understand this history. Essay authors from the disciplines of history, political science, sociology, linguistics, and film studies develop fresh models for comprehending contemporary America. For example, relatively new religious groups, new forms of immigrant communication, a resurgent nativism are all evident in present times. Contributors were also requested to propose future research needed and to present their thoughts about where the field seems to be heading.