How Did Polyamory Become So Popular?

On Season 1 of HBO’s “Succession,” the telecom heiress Shiv Roy (Sarah Snook) shocked her social-climber partner, Tom Wambsgans (Matthew Macfadyen), by sharing her misgivings about monogamy—on their wedding night. “I’m just wondering if there’s an opportunity for something different from the whole boxed-set death march,” she confesses, still in her gown. Committed to marrying up, Tom pretends to be down with the whole thing, but, a season later, he backs out of a threesome aboard the family yacht, and out of the arrangement altogether, claiming that Shiv “shanghaied” him “into an open-borders free-fuck trade deal.”