Unlike Plato, he did not theorize about idealized principels of government. Aristotle believed that the ideal form of gvm't balanced monarchy, aristocracy, and democracy in one system.
Answer:
He wants Zaroff to feel like he's being hunted. Rainsford has now tracked him down and his him on an even playing field. Zaroff is now the one who has to fight to stay alive. Aside from this, I think an ambush would be pretty difficult. Rainsford is unarmed and Zaroff is tucked away somewhere in his great chateau. A sneak attack probably wouldn't be successful.
Whenever the Nile River flooded, it left behind nutrient-rich soil. Because of this, Egyptian farmers would often plan their farming cycle accordingly, harvesting their crops BEFORE flooding season and planting AFTER the flooding season