Hello Ian dear 
You know, just a few days ago my ten year old brought up this subject after watching the news and seeing the fighting in Lebanon. She has already very wisely figured out that religion is the source of major problems in the world, and she has asked me many times why people can't just tolerate each other and get along (oh the innocence of childhood!)
I told her that the problem with religion comes down to the fact that everyone who is a believer, believes that they only have the right one. Therefore, their beliefs are surely superior to everyone elses and are the only way that you should live your life. Religious bigotry leads to violence, and it has been going on for thousands of years all in the name of supposedly pleasing a 'loving' god figure, which ever name you choose to call him/her/it.
My child is also convinced that greed is the true cause of suffering in the world (what a wise thing for one so young to realize!)
Then she said "Well nobody can prove that god created people and nobody can prove evolution either. I mean, who was there to see it? Who heard the Big Bang? In the end somebody just has to shake their head and say "I don't know, it's crazy! it just happened that way cause I believe it did!"
So we have come to the point in our household when the subject of mankinds mistreatment of each other and how we all got here, we say "I don't know, it's crazy."
I told her that at the point I'm at in my life, I have decided that it really doesn't matter one bit HOW I got here. Or how my forefathers/mothers got here, or if I did evolve from being an ape or one celled whatever.
I'm here now. What I do for others, to try to leave my mark in whatever small way by helping others if I can, that is all that matters. What you do with the life you've got is all that matters.
WE ARE ALL THE SAME!
You got that right, my friend.
essie