I agree that what we perceive of as evil, is all around us...but I happen to believe that it is all part of God’s plan, mainly because He is the creator of all.
We would have to believe in the same thing to define sin, wouldn’t we? I don’t believe that man can offend God, as man is a creation of God, acting in accordance to God’s plan.
Even the most primitive tribes in the most remote parts of the globe know the difference between right and wrong. It's the 'civilized' western hedonists who try to call evil good in order to justify their actions.