eligion is one of those subjects which is usually a difficult topic. Not only is it very broad, but also people might get offended quickly if they feel 'their' religion is being attacked.
The topics are not detailed all telling, but just a short story to give a general impression and a main timeline. It is thus by no means a complete history. Though what is told, should give you a good idea of what has happened during the years and to understand the impact and consequences. In the end religion, whether you believe or not, is an integral part of our history and even of our nowadays lifes.