The Post Classical Era

I expect that the Post Classical Era will be a repeated cycle of what happened in the Classical Era, except with slightly different conditions. In the Classical Era, empires were formed with centralized governments, then through internal and external causes, those large empires collapsed. New ideas had formed and religions sprouted out of the Classical Era. In the Post Classical Era, I expect that from the turmoil, people will try to take control and create governments and that they might create something that will only collapse like all other empires. Also the religions that were newly created in the Classical Era will probably flourish and or get modified.