EXISTENTIAL PHYSICS

A German physicist digs into a host of existential quandaries.

In her 2018 book, Lost in Math: How Beauty Leads Physics Astray, Hossenfelder, research fellow at the Frankfurt Institute for Advanced Studies, excoriated her colleagues for falling in love with theories that bear little relation to reality. In her second book, she turns her gimlet eye on popular beliefs. More than other scientific fields, notes the author, physics asks profound questions about the meaning of everything, including life and death, the origin of the universe, and the nature of reality. Religious leaders ask the same questions, as do philosophers, gurus, mystics, alternative healers, and outright quacks. Unlike many other science writers, Hossenfelder is less interested in denouncing pseudoscience than revealing that many spiritual ideas are compatible with modern physics. Natural laws contradict others, and still others are “ascientific”—i.e., neither true nor false but unprovable: “Science has nothing to say about it. At least, science in its current state.” Some fashionable beliefs are “more appealing the less you understand physics,” but Hossenfelder avoids low-hanging fruit (Deepak Chopra and Elon Musk make fleeting appearances), preferring to interview and often argue with fellow physicists, including Nobel laureates. Casting her net widely, she investigates God and spirituality, free will, universal consciousness, dualism (whether the mind is separate from the body), the Big Bang theory about the origin of the cosmos, the possible existence of parallel universes, and whether we live in a computer simulation. As the author notes, the “simulation hypothesis” annoys her because it represents “a bold claim about the laws of nature that doesn’t pay any attention to what we know about the laws of nature.” Separating reality from nonsense has preoccupied philosophers for centuries. Nonsense remains as popular as ever, but readers who wonder how to tell a good from a bad explanation can now consult two good books: David Deutsch’s The Beginning of Infinity and this one.

An intriguing book fully of highly opinionated and convincing arguments.