Marge Swanson, a fat acceptance activist who helped pioneer the concept of thin privilege, is dead from a heart attack. She was 34 years old. Swanson championed the notion that weight and health have no inherent connection. She enjoyed dying her hair bright colors, wearing glasses and dating African American men. “It’s not that I’m thin-phobic,” she once told an audience on a college campus. “It’s just that curvy women have been enslaved and victimized by capitalists for far too long and yeah, I’m upset.” Swanson was born the middle of five children to a working class family in rural...