I hate to agree with something this grim, but Humility does raise a valid point. The value of human life in the larger world is nearly nil, and children don't even have much of that.

Until the world can agree on a single set of rights and values - even a general framework of them - we should not dictate morality in many areas. The larger problem must be addressed first, and this is:

People do not agree with me.

People do wrong things and call it right. People kill for the greater good, steal to feed themselves, work for a pittance, go whaling, and tear down and deface buddhist shrines of immense beauty and antiquity. The pyramids of Giza are not studied exhaustively, there's a burgeoning sex-slave trade in Uzbekistan, and Americans buy heroin that funds their Afghan opponents.

I think we should invade these people, conquer them, and force them to submit to the will of one that is more enlightened, namely me. Because I'm always right, and...

...wait. Americans? So... I'd have to start by invading... myself.

See, that's the trouble. We disagree on a very fundamental level about things like the value of a life - but who says that I'm right? (Apart from me, of course.)