I am leaning toward India as the heart of ancient civilization. Now I will look at the genetic records, architecture and dates to see if my guess is reasonable.

Conventional archeology holds that the Romans built Baalbek. They may have built the temple to jupiter However this sits atop 3000ton dressed megaliths. Funny the Romans left no written record of how they moved those megaliths. Even stranger they had the technology to move them.
But this is a pattern repeated throughout the world, ancient ruins are built on top of carefully dressed megaliths. Frequently the basal craftmanship is of far greater quality than the overlying constructions.
This suggests to me that conventional archeology needs to get out and about more and rethink a few basics. Gobekli Tepi has given them a bit of a poke in the eye as far as shifting boundaries back is concerned. In the last 20000 years sea level has risen 400feet. How many ruins lie under the sea? I suspect a paradigm shift is in the offing.