There are 330 million people in the United States. Vox co-founder and economics journalist Matt Yglesias makes the case for adding 670 million more in his new book, "One Billion Americans: The Case for Thinking Bigger." With an increased population size, the U.S. could maintain its status as a world superpower, increase its wealth and improve its population’s standards of living, Yglesias argues. We'll talk about how his argument relates to current domestic policies on climate change, immigration and family benefits.
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