Islam was spread by many ways, 1- by sending Muslims to ask other people to covert to Islam 2- by Muslim Merchants who helped a lot by there generosity, honesty & loyalty 3- by non-Muslims who...
All over the world.
isalm spread in 56 or 52 countries
Islam was spread by God prophets and messengers since start of universe creation. Refer to question below.
It is spreading a lot in Europe, the USA and Australia, but really, it is spreading practically everywhere