Answer:
Social: ancient civilizations were very hierarchical, organized in castes. Social mobility was very difficult, this means that if a person was born poor, it was very unlikely for this person to become wealthy later in life.
Political: most ancient civilizations were monarchies, or dictatorships. Republics were essentially non-existant. That is to say that they were ruled by a single powerful man like a pharaoh, or a few people, who had no almost no limits to their power, and who were not elected by the people. Power was instead, hereditary.
Economic: all of these civilizations had an economy that was based on agriculture, because agriculture was the activity that allowed civilization to emerge in first place. The most valauble resource was land, and land was often monopolized by a few powerful individuals, the same people who had political power.
