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How did "social justice" come to mean what it does today? This episode features a chat with Will Wilkinson, a writer, political philosopher, and vice president of policy for the Niskanen Institute. Will and Julia discuss the libertarian reaction to social justice, whether or not social justice is a zero-sum game, and how the Internet exacerbates conflicts over social justice.

 Sped up the speakers by ['1.0', '1.0', '1.0']

What can we do now to affect whether humanity is still around in 1000 years (and what life will be like then)? In this episode, Julia talks with Owen Cotton-Barratt, a mathematician at Oxford's Future of Humanity Institute. They cover questions like: Given our poor track record of forecasting, is there any point to speculating about the far future? And is it rational to prioritize current people over future people?

 Sped up the speakers by ['1.0', '1.16']

This episode features a chat with Don Moore, professor of management of organizations at the University of California Berkeley's Haas School of Business, and an expert in overconfidence. Don and Julia discuss the various forms of overconfidence, whether its upsides are big enough to outweigh its downsides, and what people mean when they insist "I think things are better than they really are."

 Sped up the speakers by ['1.13', '1.0']

As the technology we rely on every day becomes increasingly sophisticated, it's getting to the point where it's too complicated to understand -- not just for individual users, but for any human at all. In this episode, Julia talks with complexity scientist Samuel Arbesman, about his new book Overcomplicated: Technology at the Limits of Comprehension, why these unprecedented levels of complexity might be dangerous, and what we should do about it.

 Sped up the speakers by ['1.18', '1.0']

Some theories violate common sense so wildly that you want to just reject them out of hand. For example, "The United States is conscious," or "The most moral act would be to replace all living beings with an orgasmic blob." On the other hand, many theories in physics that sounded similarly crazy turned out to be very well-supported (think of quantum theory, or relativity). So what role should "common sense" play in evaluating new theories? This episode features a discussion with philosopher Eric Schwitzgebel on his theory of "Crazyism," that we should expect the truth to be at least a little bit crazy.

 Sped up the speakers by ['1.0', '1.04']

If someone asks you, "What caused your success (in finance, your career, etc.)?" what probably comes to mind for you is a story about how you worked hard and made smart choices. Which is likely true -- but what you don't see are all the people who also worked hard and made smart choices, but didn't succeed because luck wasn't on their side. In this episode, Julia chats with professor of economics Robert Frank about his latest book, Success and Luck: The Myth of the Modern Meritocracy. They explore questions like: Why do we discount the role of luck in success? Has luck become more important in recent years? And would acknowledging luck's importance sap our motivation to try?

 Sped up the speakers by ['1.0', '1.15']