The correct answer should be the industrial revolution.
With the industry improving, everything else improved, meaning living conditions became better and medicine prospered, so people started dying less and had longer lives, meaning that the population began to rise.
The Zhou Dynasty was the longest lasted dynasty in Chinese History.
Japan invaded Manchuria.
They did this because Manchuria was poorly defended and had many resources.
It had living space for their surplus population and Manchuria had enough raw materials, food and other goods that would make Japan self-sufficient.
He believed that Native Americans at the time had no rights and that they were simply put into the situation they were in since inferior to whites. So he forced them to move off their land in order to create living space for US citizens and to mine for gold and other precious metals found in the NA land. Thus causing the infamous "Trail of Tears".
The first document approved was the Declaration of Independence, followed by the Articles of Confederation, followed by the Constitution, and lastly the Bill of Rights.