Buddhism is the oldest major religion out of the four. With a very big set complex of beliefs. One of them being The Four Noble Truths, suffering exists, it has a cause, it has an end, and it has a path to end. They also believe There's a reason for it and it can be ended with good karma, karma is basically good or bad actions that someone makes during their lifetime. Good actions bring about happiness in the long run, while bad actions bring about unhappiness. Buddhist's don't have just one holy book like how Christianity has the Bible, Buddhist have multiple holy books. Since the beginning Buddhism has been a very relaxing religion with a lot of peace involved. This religion believes in the theory of evolution and that everything came into this world over time. They also believe earth goes through phases of good and bad, life and death.