For much of human history, over much of the globe, the most common alternative was polygamy: marriage involving more than one spouse. Polygamy, or plural marriage, has long been an accepted form of union in human societies, involving people living on every continent. In Polygamy: A Very Short Introduction, Sarah M. S. Pearsall explores what plural marriages reveal about the inner workings of marriage, the controversies surrounding it in the LDS (Mormon) Church, and how polygamous domestic and sexual relationships have influenced larger dynamics of power, gender, rank, race, and religion in societies all over the world.