The Expansion of empires including the Mongols—facilitated Afro-Eurasian trade and communication as new people were drawn into conqueror’s economies and trade networks.
Secondly
Empires collapsed in different regions of the world and in some areas were replaced by new imperial states, including Mongol Khanates.
Lastly
Interregional contacts and conflicts between states and empires, including the Mongols, encouraged significant technological and cultural transfers.
Population in the world is currently growing at a rate of around 1.05% per year from 1.08% in 2019, 1.10% in 2018,The current average population increase is estimated at 81 million people per year.
