“Since every religion contradicts every other religion, if any religion happens to be right, all of the other religions must be wrong. That means what the majority of mankind believes, with regard to religion, is untrue.”
Adherents.com lists over “4,200 religions, churches, denominations, religious bodies, faith groups, tribes, cultures, movements, etc.” on their site. They list the 22 major religions with the number of adherents, and give the percentages for the eight largest groups as follows: Christianity, 33%; Islam, 22%; Hinduism, 15%; nonreligious, 14%; Buddhism, 6%; Chinese traditional, 4%; Primal indigenous, 3%, other, 3%.
The category of Christianity is further subdivided as follows: Anglican, Catholic, Evangelical, Jehovah’s Witnesses, Latter-day Saints, Orthodox, and Pentecostal, which means no group probably has more than 10% of religious adherents. Islam, the second largest religion, is also divided into several sects, which further dilutes their percentages as well.