White Americans of European descent will make up less than half the population by 2042, according to the U.S. Census Bureau. In other words, white people will soon become a demographic minority. Philosopher Linda Martin Alcoff says that shift represents a sea change in how we'll think about American identity. She’s the author of the new book “The Future of Whiteness.” Alcoff told Steve Paulson that before we contemplate the future, we need to grapple with what it means to be white today.