558. When Did Marriage Become a Luxury Good?

U.S. marriage rates have plummeted. But the babies keep coming, and the U.S. now leads the world in single-parent households. In her new book The Two-Parent Privilege, the economist Melissa Kearney says this is a huge problem, and that it’s time for liberals to face the facts. Plus: our friends at Atlas Obscura explore just how many parents a kid can have.