Humans are a little weak and fragile. They can not live in the wilderness like the other animals. They live in a society, sorrounded by other people - human race is very sociable.More than that, people depend each other, and this dependence make the civilization.
Once with the advent of technology, people became more artificial, they change the natural habitat with the comfortable houses, but become more isolated of other people day after day. And even this isolation is the one who will destroy the human race.
The only hope for people to survive is to maintain the relations with other people. Together, people are the civilization itself.