Written in an engaging, accessible style, the third edition has been extensively updated to include the most recent round of international censuses, emerging trends, and new chapters on epidemics, the labor force and expanded empirical discussions of race/ethnicity and sexual orientation, sex structure and gender identity. Featuring plentiful recent examples and data from the US, Europe, Asia, and Africa, it explains the demographic processes of fertility, mortality, and migration, elucidating how these concepts can be applied to understand topics such as contraception and birth control, pandemics, and public immigration policy. Introducing students to the major sources and applications of demographic data, it demonstrates how demography forms a useful lens for understanding many aspects of society, including our most pressing global challenges. A comprehensive instructor manual, chapter outline PowerPoints, and figures and tables from the book are available.