Read the introduction to David K. Johnson's BUYING GAY: HOW PHYSIQUE ENTREPRENEURS SPARKED A MOVEMENT, published in the Columbia Studies in the History of U.S. Capitalism series. Johnson tells the story of the physique magazine produced by and for gay men to show how gay commerce was not a byproduct of the gay-rights movement but an important catalyst for it. He offers a vivid look into the lives of physique entrepreneurs and their customers, presenting a wealth of illustrations.