What is the biggest religion in the world?

This can be a tricky question, as most of the world's major religions have a variety of denominations with differing traditions and beliefs.

To speak most generally, the Abrahamic religions comprise the most populous belief system in the world. Christianity, Islam, Judaism, and their associated sects make up the Abrahamic traditions. These three major religions have similar beliefs about the origin of the world, the nature of life and death, and morality. Out of the...

This can be a tricky question, as most of the world's major religions have a variety of denominations with differing traditions and beliefs.

To speak most generally, the Abrahamic religions comprise the most populous belief system in the world. Christianity, Islam, Judaism, and their associated sects make up the Abrahamic traditions. These three major religions have similar beliefs about the origin of the world, the nature of life and death, and morality. Out of the three, Christianity is the most populous religion, but again there are many differing sects into which Christianity can be broken down further.

As of 2010, about 31% of the global population was part of the Christian faith. In comparison, Islam had only about 23%, and Judaism just a mere .2%! Islam is a rapidly growing faith, and many people believe that the numbers of Muslim people around the globe will soon be greater than that of the Christian population.

Out of the approximately 2.2 billion Christians of the world, about half (1.1 billion) are Catholic, making it the largest Christian sect. Here, too, there are many different traditions of Catholicism to consider!