We're human. For all the glory and disappointment we create, we're as human as human gets. Sitting here right now I could write a song, maybe draw up the best script in the world. Maybe I paint the next great piece of work or invent some new science. In the same token, I can be used or I can use others. Maybe I get a job that unless I sell expensive stuff old people don't need, my job can be threatened. A female could get pregnant with my child and run off before I ever meet him. Maybe I create some new endless energy source knowing it can be used as a weapon. Maybe we play the "I'm stupid, drunk, high, sorry, whatever" and do something I know is wrong. Others who strongly embraced that path need no excuse to move past my excuses.
Still, sitting here right now I know I can be as thoughtful and nice as the next guy. However in my creation I am built to consume. Be it food, water or dreams, each of us makes our way in life grasping at points we take for ourselves. I cannot get to the end of my life without going though this path that requires a certain level of blood-thirst to be successful in this life and to feel pity or empathy means I'm predictable to the next guy not held back by such inconveniences.
So for fun, if you had the choice right now to end the world or preserve this current path of human nature, which way would you go?
Just you in a room with a red button. No anger, guilt, nothing.