[AntiGuv]

I did make one repeated, unfortunate error however - which was equating a particular conclusion of Fermi's Paradox (that no other civilizations have ever existed) with the Paradox itself. Fermi's own conclusion was quite different, I might add: that interstellar travel is either impossible, or at least so difficult that nobody undertakes it because it is not worth the effort.

[PatrickHenry]

that interstellar travel is either impossible, or at least so difficult that nobody undertakes it because it is not worth the effort.

It would be worth the effort if the sun were going to die soon. But we're a long way away from that. With present technology, I can't think of much else that would be a sufficient motivation.