A religious history program can teach students about the rise and spread of religions such as Christianity, Judaism, Buddhism and Islam, to name a few. A program like this may also teach students about the relationship between societies and religion.

The PhD is a doctoral degree, specifically called a "doctor of philosophy" degree. This is misleading because PhD holders are not necessarily philosophers (unless they earned their degree in philosophy!). That said, PhD recipients are able to engage in thought experiments, reason about problems, and solve problems in sophisticated ways.