SortStack #390 — 2027-07-04

By population · Order from fewest to most people.

1. Ancient Rome at the height of the empire 1M

   No European city reached a million residents again until London, around 1800.

2. The population of Estonia 1.4M

   The first country to allow online voting in national elections, back in 2005.

3. The population of Bosnia and Herzegovina 3.2M

   Its coastline is just 20 km long — one of the shortest of any coastal country.

4. The population of New Zealand 5.2M

   Outnumbered five to one by sheep — and that's actually the lowest the ratio has been in a century.

5. Greater Shanghai 29M

   Its metro system, opened only in 1993, is already the longest in the world.

6. The population of South Korea 52M

   Has the world's lowest birth rate — and the fastest average internet to compensate.

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