The human race has problems up the kazoo, but here's a real major one hardly anyone is talking about.

Robots.

"Sarah Connor: Reese. Why me? Why does it want me?

Kyle Reese: There was a nuclear war. A few years from now, all this, this whole place, everything, it's gone. Just gone. There were survivors. Here, there. Nobody even knew who started it. It was the machines, Sarah.

Sarah Connor: I don't understand.