[timr]

Right. New York, London, Paris and Tokyo have all "peaked".

[maxwell]

Manhattan, London, and Paris all peaked in the early- to mid-20th century.

Manhattan: https://urbanomnibus.net/2014/10/the-rise-and-fall-of-manhat...

Paris: https://www.parisinsidersguide.com/population-of-paris.html

London: https://www.washingtonpost.com/news/worldviews/wp/2015/01/07...

City of London: https://upload.wikimedia.org/wikipedia/commons/f/f6/Populati...

Tokyo is probably approaching peak: https://proxy.duckduckgo.com/iu/?u=http%3A%2F%2Fjapanpropert...

Tokyo Core: http://www.newgeography.com/files/cox-tokyo-1.png

[timr]

Pedantry. If you honestly believe that Manhattan "peaked like a star quarterback" in 1910, I don't know what to say to you.