The idea of the American family has changed dramatically over the past few decades: Young Americans are marrying later, finding marriage and parenthood to be less central concerns. But what does the structure of the modern American family mean for us, and how much is it costing us? To unpack the issue, we've enlisted author Ty Tashiro, New York Magazine's Maureen O'Connor, and Mona Chalabi of FiveThirtyEight.