In most cases people see what they prefer to see. Their response to such impossible questions tells you more about them - how they see the world, their sense of life - than it does humanity at large.

I agree, this is a hard subject, whether people are good or not. I've always believed we're all capable of doing good under certain conditions, but let most get out of their comfort zone and they'll turn on you like a mad dog. (sorry) Proof? just look at our political scene the last 5 plus years. I won't debate any thing ideologically anymore with co-workers, they simply default to anger when you press them to explain how they feel and why about any difficult ideas.