Then and Now
Celebrate 100 years of The World Book Encyclopedia by taking a look at the world in 1917 compared to today.

The Biggest Cities and How They Grew (or Didn’t)

Cities are the world’s most crowded places. Even in ancient times, there were many large cities in the world, though ancient cities had far fewer people than today’s cities. When the first edition of The World Book Encyclopedia was published in 1917, its “City” article ranked London as the world’s largest city.