They constitution protect slavery in a way that you can pay people to work for you but you cannot make them do it they have to be their on their own consent and it proctect slavery because people were dying from being overworked and underpaid.
Spain. Won. Because they fought four their lives
While the Persians did enforce some rather retrospectively horrid punishments specifically punishing the Egyptian aristocracy by selling there daughters into slavery and killing their sons it is important to remember that everything from a historical perspective is realities. <span>the Assyrians on one hand once invited its enemy's over for a feast and served them their own son's head on a platter. then proceeded to rip out the eyeballs allowing them to live the rest of their lives with the last sight being the head of their sons.</span>
Answer:
They created irrigation systems and used canals to control flooding. They also used the silt brought by the floods to help with their farming.