I think your assessment is more or less spot on, we've faced down civilizational threats before. I want to add that there's a statistical trend to have less of

I think your assessment is more or less spot on, we've faced down civilizational threats before. I want to add that there's a statistical trend to have less offspring once quality of life improves, as well. That being said, civilizations have come and gone before. I believe we must not fall into "tech religion", and wait for magical solutions when we can and should address many things politically rather than technologically. I am also happy we're reaching for the solar system, because a backup mankind seems prudent.