The book A Fortunate Universe: Life in a Finely Tuned Cosmos (Cambridge University Press, 2016, Fig. 1) by Geraint F. Lewis and Luke A. Barnes is one of the most recent and comprehensive books on the fine tuning of the physical laws of our universe. The “fine tuning of physics” refers to the discovery that the laws of nature, as currently understood, are just what they must be for life forms such as us to exist. Change any of these laws even slightly, and life as we know it would be impossible. The authors explain the various ways the universe is fine-tuned and then explore what fine tuning may imply. Lewis and Barnes examine particle physics, the funda- mental forces, cosmology, inflation theory, the flatness and horizon problems, the idea of a multiverse, string theory, the nature of the constants in the equations of the laws of physics, quantum mechanics, relativity, dark matter, dark energy, the double slit experiment, and much more. Both authors accept the standard cosmological and biological evolutionary stories including deep time. Nevertheless, even within the Big Bang/inflationary paradigm, fine tuning is seen everywhere from quarks to galaxy clusters. As we shall see, the fine tuning of physics renders naturalistic explanations untenable. Much of the discussion is useful to biblical creationists as the fingerprints of God are clearly seen throughout the created order.
Lewis and Barnes are both graduates of the University of Cambridge (Fig. 2). Lewis holds a PhD in astrophysics while Barnes has a PhD in astronomy. Both men work at the Sydney Institute of Astronomy in Australia. Both men freely acknowledge fine tuning but differ in their interpretation of it. Lewis looks to the multiverse to explain fine tuning. Barnes, a Christian, argues for theism as the best explanation.
The book is accessible to layman yet informative to specialists. The concepts are laid out logically and clearly with an occasional dash of humor.
This review will discuss some of the highlights of the book, chapter by chapter.