Today there are only four religions whose faithful exceed 1% of the world's population: Christianity, Islam, Buddhism and Hinduism(and arguably a fifth, if we include the nebulously defined Chinese religious/philosophical traditions). And of those four/five, Christianity and Islam have a near-duopoly outside of the Eastern half of Eurasia, with most of their faithful following relatively orthodox(from an outsider's perspective) denominations.
With a POD no earlier then Abu Bakr's victory in Ridda wars(so avoiding the obvious cop-out of "no Caliphate"), how much more diverse could the world's religious landscape be?
With a POD no earlier then Abu Bakr's victory in Ridda wars(so avoiding the obvious cop-out of "no Caliphate"), how much more diverse could the world's religious landscape be?