his Greek mathematician was known for his work in geometry and physics. The Greek army used two of his inventions: the catapult and the mirror system. Egyptians later used a screw system that bears my name to irrigate the Nile River Valley. Who am I?

Ineed this now complete the paragraph about social darwinism. social darwinism to justify by suggesting that it is natural and acceptable for powerful and wealthy nations to colonize regions that are less powerful. used this theory to justify the practice of political, economic, and cultural colonialism.