Why has Islam not spread as widely as Christianity, even though the number of Muslims globally is less than the number of Christians?

The truth of a religion is not measured by the number of its followers. Truth remains truth even if its adherents are few, and falsehood remains falsehood even if its adherents are many. The Quran has shown that most people on earth have followed falsehood.

Truth and falsehood are not distinguished by the multitude of followers, but rather by sound evidence and proof. The impact of Western material and media power in promoting Christianity must also be considered.

Nevertheless, the number of Muslims in the world is increasing, and many Christian scholars are converting to Islam. Some Western research centers indicate that Islam is the most widespread religion in the world.