"I am sure the millions that perished under Stalin, Hitler, Pol Pot and other cruel dictators will find comfort in your assurances."
LOL! Look at what you're saying in sarcasm. FYI, we defeated Hitler and the followers of Stalin with the goodness we learned from our Greatest Generation. We will eventually defeat all who indulge in sadism--Saddam Hussein, for example. Sadists are vain. That's why they lose. They might execute their cruel tendencies against good people for a time, but they'll be defeated sooner or later.
Evil is not strength. Goodness is strength. The vain and evil ones only believe that their cruelties will keep victory for them. But their vanity and consequent underestimation of our strengths is what brings defeat to them.
That's why, in most cases, a good combat soldier can beat a nasty, dirty hippie any day.
Obviously you do not have any teenagers.
What age do you consider appropriate for teenagers to discover the real world? After they leave for college when there are no parents to comfort and guide them through their discomfort?
Yes, we defeated Hitler, but not Stalin or Pol Pot, so that's two out of three for the bad guys. So what was the problem, we didn't have enough goodness? Were we "evil" while Pol Pot was slaughtering millions? While he was President, Jimmy Carter was a good man, but he got his butt kicked continually. On the other hand, Reagan took down the Soviet Union. Was that because Reagen had more goodness than Carter? I do believe that the United States is a morally just nation, but that in itself does not mean we will prevail. We must have the determination and the will to face our enemies and defeat them. That doesn't happen by sprinkling "Goodness Dust".