They used complicated math and science skills to build impressive structures.

 
Poets, historians, philosophers were valued.

 
They made new discoveries in medicine and surgery.

 
They built aqueducts to deliver water to the city.

 
They forced slaves and criminals to become gladiators and fight for their lives just for rich citizen's entertainment.

 
Criminals and prisoners of war were executed publicly or mauled by wild animals in the colosseum.

 
They treated slaves as property of their master. They put collars on slaves to prevent them from running away.

 
They were intolerant to other religions or beliefs because they executed Jewish and Christian people harshly.

 
Masters could kill or beat their slaves for no reason until they became expensive because of less frequent wars.