Humanity is such that if left alone will destroy itself.
Well, you may eventually prove to be right about that, but not for the reasons you think. I believe that the fundamentalist Christian views, about End Times, and Revelation being a history of the future, and similar things, are a terrible danger, because they're likely to be self-fulfilling. I think one of the more likely self-inflicted "End of the World" scenarios is a religious convulsion, true believers of various stripes, probably Christian versus Muslim if contemporary events are any guide, convinced that they're absolutely correct and are fulfilling the will of God, trying to wipe each other out and destroying the planet for all of us in the process. And it'll all be for nought, because they're not correct. There's no good reason to think Revelation has anything to do with modern times, it's about Roman persecution of Christians in the first century of the Common Era, and that's *all* it's about, it's all readily explicable in that context.
But suppose, for instance, that you're a fundamentalist Christian who believes all that stuff about the End Times, and you also happen to be the leader of the most powerful nation in the history of human civilization. You have your finger on a button that can actually end the world in ways that can be understood as consistent with certain interpretations of Revelation that you subscribe to, and you believe you're a chosen instrument of God's will. Under the right circumstances, believing you're fulfilling divine commands and prophecies, you will push that button and wreck the place for all of us, for no reason but your own unprovable and untestable convictions.
And that, fundamentally, is why I think religious belief is dangerous and stupid. It believes itself to be absolutely correct, with no test in reality, and when people think that way, history shows that they routinely and reliably do unspeakably horrible things to each other if they can.
