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).