Look, I figure we're going to have a few more wars over really stupid stuff like opposing ideologies and oil, but we're not going to destroy ourselves. Natural disasters? We can take em'. Even if the entire structure of society throughout the world crumbles into dust, the Human species will survive.
The worst that could happen is a nuclear holocost or cosmically caused extinction event. (No, asteroids don't count. We can blow up asteroids any day.) I'm talking Solar Flares and the always possible but unlikely Gamma Ray Burst.
Please feed the trolls. XD