Pinker explains several concepts underlying rationality, including from the fields of logic, probability theory, statistics, and social choice.

[3] The book debuted at number nine on The New York Times nonfiction best-seller list for the week ending October 2, 2021.

"[5] To Andrew Anthony on The Guardian, Pinker, not a "dry and humourless slave to rational thought", "knows that what we find funny is often nothing more than clever inversions of logic".

[6] Kirkus Reviews wrote, "The author can be heady and geeky, but seldom to the point that his discussions shade off into inaccessibility.

"[7] On The New York Times, Jennifer Szalai commented that "The trouble arrives when he [Pinker] tries to gussy up his psychologist's hat with his more elaborate public intellectual's attire",[8] while Anthony Gottlieb noted Pinker's tendencies to "exaggerate the popularity of ill-founded beliefs" and to devote "plenty of space to advocating rationality, which the authors of similar works have not found necessary to do, perhaps because anybody who chooses to read about rationality is probably already in favor of it.