What was the purpose of the Great Wall?

Question

To separate warring states
to keep out nomads to the north
to standardize Chinese roads
to make trade and transportation easier

Answer 1

The purpose of the Great Wall was primarily to keep out nomads to the north. While it did serve as a physical barrier to separate warring states, it was primarily built as a defensive structure to protect China from invasions by nomadic tribes like the Mongols. The wall was not constructed to standardize Chinese roads or to make trade and transportation easier.