 The argument from fine-tuning for the multiverse as just sketched is sometimes characterized as an inference to the multiverse as the best explanation of fine-tuning for life—an explanation which, in view of its appeal to anthropic reasoning, is sometimes characterized as “anthropic” (e.g., Leslie 1986, 1989: ch. 6; McMullin 1993: 376f., sect. 7; Bostrom 2002). It is controversial, however, whether this characterization is adequate. A paradigmatic anthropic “explanation”, characterized as such by Carter in the seminal paper (1974) that introduces the anthropic principles, is astrophysicist Robert Dicke’s (1961) account of coincidences between large numbers in cosmology. A prominent example of such a coincidence is that the relative strength of electromagnetism and gravity as acting on an electron/proton pair is of roughly the same order of magnitude (namely, \(10^{40}\)) as the age of the universe, measured in natural units of atomic physics. Impressed by this and other coincidences, Dirac (1938) stipulated that they might hold universally and as a matter of physical principle. He conjectured that the strength of gravity may decrease as the age of the universe increases, which would indeed make it possible for the coincidence to hold across all cosmic times.