The Third Civilisation
The third Civilisation started about sixty million years ago. There had been survivors from the Second but not many.
During all the time of that civilisation there was not much spiritual progression but a great deal happened. Referred to as Sodom and Gomorrah in the Bible, the World had become more evil than good and therefore, it had to end.
The civilisation was finally destroyed about five million years ago due to disease, fire and nuclear energy.