I don't know what's wrong with me!?

I feel like lately I've been watching people and all the horrible things they do, and just for such insignificant things like drug! Why must everyone in the world suffer for all those other people who enjoy destruction. Nobody seems to care about the environment until they actually see Earth nearly be destroyed. I feel like there's no hope for humanity at all anymore, we've just grown too far from eachother, and like to defend our territories as if it were gold. Humans are just greedy and naturally evil organisms. I was raised alone in a big house in the mountains, my mom told me to play outside so I rarely watched tv, so I was basically secluded from the world, so when we moved to Los Angeles at 8, I've never heard one bad word or of gangs and that they hate eachother because they just do. I think all the thoughts are surfacing because I'm a hormonal 16 year old girl, but does that mean I'm wrong? Haven't we forgotten our roots and that we all came from the same place?