Do you wonder how many civilizations have existed on earth prior to the current one?

Question

I have thought, for a while now, that there must have been many civilizations of mankind on this planet before this one we live in. It could be that we have killed ourselves repeatedly leaving only a handful of people to reshape the world and re-form (not reform) society, again and again.

Anyway, these are the things I think about. What are your thoughts?

NOTE: Not enough room to get into it here. Stupid 1000 character limit, etc.

I am speaking of the civilization of MANKIND, not individual civilizations within mankind, but the whole enchilada.

Answer 1

Many civilizations have come and gone on planet earth. Nevertheless there have been no civilizations as technologically advanced as our own. If there had been there would be some evidence in the archeological record. That there is not means that either the civilization never existed, was so completely destroyed as to leave no trace, or actually predates the epochs of which we do have evidence. No trace would be unbelievably extremely unlikely. This would mean no radiation, no evidence of global effects on the enviroment, nothing solid enough remaining to create a fossil. A civilization predating archeology is similarly unlikely. This would mean before the dinosaurs, before the trilobyte. This leaves the only reasonable conclusion. It never happened, at least not on this planet.

Answer 2

We know that many civilizations have come and gone....and the gene pool of that handful is what worries me most..." Beware ",
there are still more to come.