Actor Michelle Pfeiffer. Humorist Garrison Keillor. Actor Joaquin Phoenix. Musician Lisa Marie Presley. Actress Glenn Close. WikiLeaks founder Julian Assange. Actress Rose McGowan. Each of these well-known people has more than fame in common; each was born or raised in a cult.

We think of cults as bizarre, inexplicable, or otherworldly places that only strange people inhabit, but cults and other abusive and high-demand groups (and relationships) are actually quite commonplace. In fact, the behaviors, social pressures, and authoritarian structures that create cults exist to a greater...