Every year, when the Nile River flooded, the soil was filled with nutrients for all these crops to grow. One thing that the Nile River really helped with, was that the river provided so many jobs to many people living in Egypt. Without the Nile River, there would be many unemployed, which means many that were impecunious.
The Spartans valued discipline, obedience, and courage above all else. Spartan men learned these values at an early age, when they were trained to be soldiers.
I think one way the British attempted to take control of the India subcontinent was that they removed India from a British company and placed it in the hands of Queen Victoria, who took it over.