Well, yeah that's a plausible hypothesis. I tend to think the great filter is behind us. Most animals on Earth aren't intelligent, and it took a long time for h

Well, yeah that's a plausible hypothesis. I tend to think the great filter is behind us. Most animals on Earth aren't intelligent, and it took a long time for humans to appear. But I did read something today about how a nuclear war almost happened at least a few times. Though I think that would only be a temporary setback, it would take an awful lot to exterminate us completely.