Should public colleges be tuition-free? Should student loan debt be forgiven? The columnists discuss Pete Buttigieg’s criticisms of his more liberal Democratic rivals’ plans to reduce the costs of higher education, and debate the cost and funding of higher education. Then, birthrates around the world are falling. Anna Louie Sussman joins the conversation on the causes and implications of what she defined in her recent Times op-ed, “The End of Babies.” For background reading on this episode, visit nytimes.com/theargument.