We can learn much, seeing what is happening, and then we can think introspectively about other civilizations which have disappeared, either through war or through calamities which apparently look natural.
But I don’t feel that they were natural. Those civilizations must have done something stupid that caused the calamities.
“Were there not already highly developed civilizations living on this earth?”
There were, but they all got into the same mess in which we are entering; they all got into the same darkness in which we are entering.
“And yet their consciousness got lost and man had to start all over again.”
Their consciousness was not lost – they had no consciousness. They had just the same superficial consciousness as we have.
Osho, The Razor’s Edge, Ch 11, Q 1 (excerpt)