The Anthropic Principle and Fine-Tuning Arguments

Published book:

The Fallacy of Fine Tuning:

How the Universe is Not Designed for Us

For more information, go here.

This books contains my latest discussion on this subject. Below are older communications.

Books where I have discussed fine-tuning

The Encyclopedia of Nonbelief

Tom Flynn, ed., Prometheus Books 2007, pp. 65-70.

The Anthropic Principle. Refer to published version when referencing.


Is the Universe Fine Tuned for Us? In  Why Intelligent Design Fails: A Scientific Critique of the New Creationism, essays edited by Matt Young and Taner Edis (New Brunswick, NJ: Rutgers University Press, 2004). This link is to submitted draft. Please quote or refer to published version. To read Rocky Mountain News column by Linda Offenbach on this book, go here

The Anthropic Principle. Draft of a chapter for  Science, Religion, and Society: An Encyclopedia of History, Culture, and Controversy edited by Arri risen and Gary Alderman, (Armonk, NY: M.E. Sharpe, 2006).
Please refer to published version

Physics, Cosmology and the New Creationism  Chapter for Scientists Confront Intelligent Design and Creationism, Andrew J. Petto and Laurie R. Godfrey, ed. (New York: W.W. Norton, 2007). Also in Scientists Confront Creationism: Intelligent Design and Beyond, Andrew J. Petto and Laurie R. Godfrey, ed. (New York: W.W. Norton, 2007).


Program to generate toy universes with different values of four physical constants. Note the emphasis on "toy." This is a very simple program that makes no attempt to generate a universe in detail. Its main purpose is to demonstrate that long-lived stars, which are probably required for the evolution of life, does not depend on some "fine tuning" of the constants of nature but occurs for a wide range of parameters. It also shows that the large number coincidence first proposed by Weyl is not uncommon.

Note that the weak interaction strength has not been included as a parameter. Also, the effect of strong interaction strength is not included in the calculation of astronomical quantities, although it does come in for the large number coincidence. While the gravitational strength does not appear as a parameter, it is varied through variations in the proton mass. For more details see the Philo paper below.

To generate your own universe, click on MonkeyGod.

I have used equations from "Dependence of macrophysical phenomena on the values of the fundamental constants: by W.H. Press and A.P. Lightman, Phil. Trans. R. Soc. Lond. A 310, 323-336 (1983).

Older Articles

Some Old Links Here you will find both popular overviews and scholarly material on everything  related to observation selection effects, the anthropic principle, self-locating  belief, and associated applications and paradoxes in science and philosophy. By Nick Bostrom, Rea search Fellow  Philosophy  Faculty, Oxford University

Why the Universe is Just So by Craig Hogan U. Washington. Published in Rev. Mod. Phys. 72, 1149, 2000.


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