Your friend saw this resource on bethinking.org and thought you should see it:
Does Belief in God Cause Wars?
A talk considering the question: 'Does belief in God simply lead to war and conflict?'
See the full resource online by visiting bethinking.org:
https://www.bethinking.org/is-religion-harmful/does-belief-in-god-cause-wars
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bethinking.org is a collection of resources which aims to make sense of the big questions of life about God, Jesus and Christianity.