What lies ahead? Brb checking crystal ball.

From what I understood from the reading, the Post-Classical Era will consist of restoration, from a social & political standpoint, anyways. All the destruction caused by internal struggles is what causes the need for this restoration, and I guess I would be wrong to not include that external pressures played and equal role in destruction. Populations increase everywhere in relation to agriculture and its advances; people devote their time and effort into agriculture as it is booming. This causes manufacturing and trade to boom as well, leading (slowly) to great technological advances. Religions, along with all the material exchanges, start to go spread around rapidly. Islam and Christianity, specifically become the bases for empires. Centralized control loses a lot of popularity; it never returns to India and it is only in Western Europe for a short period of time.