Senators:
- Patricians: members of the oldest and most noble families
- Plebeians: wealthy commoners who achieved Senatorial status
Equestrians:
- Roman knights- wealthy land-owners of business owners below Senatorial rank but socially important. Some knights held administrative, managerial or military role; others invested in commerce
Plebeians:
- The majority of Roman citizens who didn't hold Senatorial or Equestrian rank
Freedmen:
- Former slaves legally emancipated into freedmen status
Slaves:
- People forced into labour without pay