Explain what isolated the chinese from the peoples in other parts of asia

The famous Battle of Red Cliffs took place along the river. To the south and southeast of China are the Himalaya Mountains. ... They provided a nearly impassable border for Ancient China, keeping the area isolated from many other civilizations. They were also important to Chinese religion and were considered sacred.

The dangers of an inadequate monetary supply.

The nineteenth amendment changed voting rights as it allowed for women to vote nation wide