section_path: Society
section_name: Society
paragraph_text: Society
  
  The imperial city of Rome was the largest urban center in the empire, with a population variously estimated from 450,000 to close to one million. Around 20 per cent of the population under jurisdiction of ancient Rome (25–40%, depending on the standards used, in Roman Italy) lived in innumerable urban centers, with population of 10,000 and more and several military settlements, a very high rate of urbanisation by pre-industrial standards. Most of those centers had a forum, temples, and other buildings similar to Rome's. The average life expectancy in the Middle Empire was about 26–28 years.