According to Pew Research Centre demographic analysis, Christianity is still the largest religion in the world until now. It was estimated that there were around 2.4 billion people who considered themselves Christian. But some research say that the number will be declined in the following decade. Pew research center says that Islam will be the largest religion by 2030. Right now, Muslims make up the second-largest religious group globally. Around 1.9 billion people – or 25% of the world’s population are Muslim.
