Which religion in the world is developing rapidly now? Why?

Islam is the fastest growing religion in the world, and the main reason is not the increase of new believers, but the increase of Muslim population. Although Islam does not encourage childbearing, Muslims have a tradition of having more children. In Muslim countries, except Iran, family planning is not practiced, so the population growth rate of major Muslim countries is double digits.

From the perspective of pure faith, Christianity has developed rapidly in Asia and Africa. For example, Korean Christians have accounted for 70% of the population and become Christian countries. On the contrary, in Europe and America, non-Christianity has developed rapidly. Due to the increase of Muslim immigrants, the number of Muslims in developed countries has increased rapidly. It is worth noting that Buddhism, especially Tibetan Buddhism, has developed rapidly in Europe and America in recent years, and lamas are very popular in the west, which is not unrelated. In addition, new religions such as Baha 'i are also developing rapidly. Now the Baha 'i International Organization has been listed as a cooperative NGO by the United Nations.