People always tend to underestimate both the darkness and the good in people. I'm pretty sure I'm more cynical than you. (I found Requiem for a Dream to be a mercerizing experience and took me many months to even figure out why people even consider the movie depressing. I'm also a huge Gen Urobuchi and Junji Ito fan) But I'm also a very hopeful person.

My reasoning is that Evil is self destructive while good isn't. Evil survives because of the good that is left. I would even say there are 4 kinds of people that do good:
1)The benevolent ones
2)Those who have nothing else to do. (I consider myself a mix of these 2)
3)The miserable suckers
4)Evil people

The best weapon of Evil is the good. I invite you to read these 2 short stories I've written.
300 Word Short Story #+1 A story about a criminal family and a young man who lost everything.
300 Word Short Story #-1 A story about a criminal family and a man who lost everything.

Perfect evil would be perfect self-destruction. This cannot exist. But Perfect goodness is only insanely difficult. If it's achievable, someone would achieve it. As a trader I'll also say this: You cannot loose betting against(shorting) humanity. But the best wins would come from the Individuals who become the exception. When banks fall, precious metals shoot for the moon. I'm willing to make both these bets.