So if mankind can't do it, who?
So if mankind can't do it, who?
God, for one.
There are a number of moral athiests out there, but even they tend to have moral ideas that are rooted in faith.
But to answer what I think your question is, how about this-
We have government because it's a necessary evil. I don't think we need more of it. I think we have far too much. But I also don't think we could get by on as little as the 'L'ibertarians would like. Freedom without discipline is anarchy.