Humans have a natural propensity for violence. Would you suggest that other base instincts (such as lust) are just because of some outside influence? Because

Humans have a natural propensity for violence. Would you suggest that other base instincts (such as lust) are just because of some outside influence? Because that is exactly what religion believes and it is ridiculous. We need to deal with people as they are, the rationalisation (religion) comes after.