Benford's law states that the occurrence of significant digits in many data
sets is not uniform but tends to follow a logarithmic distribution such that
the smaller digits appear as first significant digits more frequently than the
larger ones. We investigate here numerical data on the country-wise adherent
distribution of seven major world religions i.e. Christianity, Islam, Buddhism,
Hinduism, Sikhism, Judaism and Baha'ism to see if the proportion of the leading
digits occurring in the distribution conforms to Benford's law. We find that
the adherent data of all the religions, except Christianity, excellently does
conform to Benford's law. Furthermore, unlike the adherent data on
Christianity, the significant digit distribution of the three major Christian
denominations i.e. Catholicism, Protestantism and Orthodoxy obeys the law. Thus
in spite of their complexity general laws can be established for the evolution
of the religious groups.Comment: 11 pages, 11 figures, 3 tables, title changed to "The law of the
leading digits and the world religions" for journal version in publicatio