Why are humans so selfish and violent?

i my self am from a planet called Tarquisha, look and breath the same as you humans, but tend to have a much more peaceful, planet/world strong unity. regardless of our marks ( your race ) we learn to live and care for each other. We basically are 1 nation without a thought of violence, greed, power in our minds as we live to learn for our future generation. You humans control each other with fear. lies, corruption and no remorse what so ever. I personally think that even if this planets people even did manage to open their eyes, it would cause more harm then good. We will continue to watch over you all as you WILL be the end of your self's. You cannot be saved, im sorry.