Though we can’t prove the existence of one (or many) god(s), we can provide evidence for the power of religion. For good or for evil, faith factors into our everyday lives in one way or another. We’ve evolved to believe. But it is also clear that extremist beliefs can have terrible consequences.
I won’t go through a list of the evils that religion can support or contribute to, for all you need to look at for a history of evil is most any “holy scripture” describing “holy” wars and destruction (the one I am most familiar with is “The Book of Judges” in the Hebrew Bible). Or, your daily newspaper or twitter feed.
Here are several articles: (Yes, there will be a quiz! )