Some of the 'civilisations' that you mention are remembered for their great achievements (eg the pyramids). However wonderful these thing are, real people had their life choices severely restricted, probably suffering slavery, malnutrition and disease. If you had been alive then in one of those state, the chances are that you would have been amongst the 'downtrodden'. If you had been, would you have been thinking 'my suffering is worth it because we are building a pyramid for future generations' or would you have resented the system you were in?