Answer:
natural law
Explanation:
John Locke, whose ideas were reflected in the ideas of the founding fathers of the United States, wrote back in 1690 that the natural right of a person is the right for protection of life, freedom and property from threats and encroachment from the outside.
I think it’s rapid invasion by air and land .
1. weakened Persian and Byzantine rule
2. effective fighting methods.
The Civil War or like the South's wealth (plantations)
