[oldcynic]

Not at all. A little glibness aside, I do think we should have replaced many things with better or less polluting alternatives far, far earlier than we do. The market is the wrong tool for many of these choices as shown by some of the current global issues.

At such a vast time distance there's likely nothing whatsoever left of us - except in the geological record as a few rare fossilised artefacts and environmental clues. We have a hard enough time understanding life a couple of thousand years back and religion is all too often trotted out as easy explanation for "we don't know why".