Why did early Chinese civilizations and dynasties thrive for thousands of years with little outside influence?

• The Great Wall prevented invasions.
• The Chinese did not need to trade for goods and resources.
• Mountains and deserts provided natural barriers.
• China is protected by water on all sides.

The reasons why early Chinese civilizations and dynasties thrived for thousands of years with little outside influence include:

- The Great Wall prevented invasions: The construction of the Great Wall of China helped to protect the Chinese civilization from invasions by nomadic tribes and other potential threats from the north.

- Mountains and deserts provided natural barriers: China's geographic features, such as the Himalayas and the Gobi Desert, acted as natural barriers that made it difficult for foreign invaders to penetrate and conquer the region.

- China is protected by water on all sides: Being surrounded by bodies of water, such as the Pacific Ocean and various rivers, helped to protect China from invasions by sea and limited access for potential invaders.

Overall, the combination of these factors helped to create a relatively stable and isolated environment for Chinese civilizations to thrive and develop over thousands of years without significant outside influence.