The Book of Why: The New Science of Cause and Effect

By Judea Pearl and Dana Mackenzie *83

Published April 23, 2018

For decades, scientists lived by “correlation does not imply causation,” but not anymore. The Book of Why (Basic Books) puts the study of cause and effect on a firm scientific basis, explaining when we cannot know causation, and when we can say so confidently.

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The January 2026 cover of PAW, featuring a man and a woman and the headline "Empower Couple."
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January 2026

Giving big with Kwanza Jones ’93 and José E. Feliciano ’94; Elizabeth Tsurkov freed; small town wonderers.