Who should be taxed according to henry george's ‘single tax’ theory?

All of the society

Explanation:

Henry George has had a theory and pushed for it to be accepted. His theory was that the economic renting of land should be shared by the whole society. Basically he had a communist idea. His ideal was that the whole land to be nationalized, so the government would have full control over it, its development, control, planning, organizing. This also meant that all the people should work on the nationalized land, thus for the government, meaning that the society would have made one very big step toward communism.

these civilizations were located around fertile rivers, where they could produce an abundance of crops