7. Judaism
Followers: 14 million
You will surely be familiar with this entry on our list of most popular religions in the world. There are currently 14 million people (0.2% of global population) who consider themselves Jews, but the number of Judaism adherents could be bigger. The biggest number of Jews is located in the United States (5.69 million) and Israel (5.61 million) with Canada, France, and the United Kingdom also having big Jewish communities. Judaism is one of the oldest monotheistic religions, basing its teachings on Torah (foundational text) and oral tradition. Just like in all major monotheistic religions, there is a number of Judaism branches with differences in approach.
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