The first civilizations that we have knowledge of developed in the valleys of major rivers: the Nile (Egypt), the Tigris and the Euphrates (Mesopotamia), the Yellow River (China) and the Indus River (India).
These civilizations developed in the valleys of rivers because this environment provided them with various vital resources. A constant and reliable source of water was needed for the development of agriculture, which allowed them to sustain large populations. Agriculture also flourished due to the fertile soil that tends to surround river valleys. The rivers also worked as a highway, allowing them to develop trade and facilitating the exchange of information.
The reason why General Longstreet urge Lee not continue the battle of Gettysburg is that Lee at that time is sick, weak and able to fight anymore, even if Lee ha a strong spirit in fighting but General Longstreet knows that he will not make it to the battle field.
Answer:
These populations continued to grow at a rapid rate throughout the 18th century made up as much as 80% of the population in Virginia in the 17th century.
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