Eps 4: Why Islam is the religion of the future

The Muslim population, for example, is expected to grow twice as fast as the rest of the world's population between now and 2050, largely because Muslims tend to be young and have high fertility rates.
But perhaps the most significant finding is that Muslims may gradually overtake Christians as the world's largest religious group in the coming decades.
The number of people who don't claim any particular religion is expected to rise modestly in the next few decades, but the world is going to grow much faster than the religiously unaffiliated population will.