What do Karl Marx, Sigmund Freud, and Malcolm Gladwell have in common? Are interesting theories more significant than true ones? And what has been keeping Angela up at night? Plus: an important announcement about the show.

• SOURCES:
  • Charles Darwin, 19th-century naturalist and biologist.
  • Murray Davis, cultural sociologist.
  • Malcolm Gladwell, journalist and author.
  • Adam Grant, professor of management and psychology at the University of Pennsylvania.
  • B. F. Skinner, 20th-century American psychologist.

• RESOURCES:
  • Small Fry, by Lisa Brennan-Jobs (2018).
  • Grit: The Power of Passion and Perseverance, by Angela Duckworth (2016).
  • "Why Malcolm Gladwell’s Ideas Are So Interesting, Whether or Not They’re True," by Adam Grant (Quartz, 2015).
  • David and Goliath: Underdogs, Misfits, and the Art of Battling Giants, by Malcolm Gladwell (2013).
  • Curious?: Discover the Missing Ingredient to a Fulfilling Life, by Todd Kashdan (2009).
  • "Interest — The Curious Emotion," by Paul J. Silvia (2008).
  • Exploring the Psychology of Interest, by Paul J. Silvia (2006).
  • "The Ketchup Conundrum," by Malcolm Gladwell (The New Yorker, 2004).
  • "That's Interesting!: Towards a Phenomenology of Sociology and a Sociology of Phenomenology," by Murray S. Davis (Philosophy of the Social Sciences, 1971).
  • The Expression of the Emotions in Man and Animals, by Charles Darwin (1872).

• EXTRAS:
  • "How Do You Identify a Narcissist?" by No Stupid Questions (2024).
  • "Is Screen Time as Poisonous as We Think?" by Freakonomics Radio (2024).
  • "Abortion and Crime, Revisited (Update)," by Freakonomics Radio (2024).