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What it argues
The Fabric of Reality is David Deutsch's argument that four distinct strands of explanation — quantum physics, epistemology, the theory of evolution, and the theory of computation — are not separate fields but facets of a single unified description of reality. Deutsch, a physicist at Oxford who pioneered the concept of the quantum computer, writes with the conviction that most popular accounts of science fail readers by explaining what scientists have discovered without explaining how knowledge itself works or what it means for something to be real.
The book's most provocative claim concerns quantum mechanics. Deutsch is a committed advocate of the many-worlds interpretation, developed by Hugh Everett in the 1950s. In this view, quantum interference effects — the experimental basis for the whole field — are only explicable if vast numbers of parallel universes actually exist and interact at the quantum level. Deutsch argues that the other interpretations of quantum mechanics, including the Copenhagen interpretation still taught in most textbooks, are philosophically evasive: they describe what happens without committing to what is actually there. The multiverse, in his view, is not speculation but the most straightforward reading of the evidence.
What it gets right
- 1.
Quantum mechanics, epistemology, evolution, and computation are not separate disciplines but interlinked strands of a single description of reality — understanding one requires understanding all four.
- 2.
The many-worlds interpretation of quantum mechanics is, in Deutsch's view, the only interpretation that takes the theory's implications seriously rather than evading them with talk of observation and collapse.
- 3.
Quantum interference experiments are direct evidence that parallel universes exist and interact at the quantum level; the interference effects require an explanation, and other universes provide it.
What it covers
Who wrote it
David Deutsch is a physicist at the University of Oxford and a pioneer in the field of quantum computation. He proposed the concept of the universal quantum computer in 1985 and has made foundational contributions to quantum information theory. His follow-up book, The Beginning of Infinity, extends the epistemological arguments of The Fabric of Reality. Deutsch is a committed advocate of Karl Popper's philosophy of science and of the many-worlds interpretation of quantum mechanics. He has received numerous honors including the Dirac Prize and the Edge of Computation Science Prize.
