Abstract
An answer to Fermi's question, ‘Where are they?’, is presented. The answer is: we are alone because our Universe is bad for civilization. The combination of physical constants does not need to be more fine tuned than is necessary to permit one civilization and, since extreme fine tuning of the constants is a very unlikely event, it is most likely that our Universe is just good enough to permit the development of only one civilization. The alternative anthropic principle can be formulated as follows: ‘It is most likely to observe a universe in which civilized life is an extremely rare phenomenon.’
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