That population growth doesn't seem to exist. Certainly not in NYC graphs. San Francisco was exponential growth until 1940, then flatlined since 1950. Detroi

That population growth doesn't seem to exist. Certainly not in NYC graphs. San Francisco was exponential growth until 1940, then flatlined since 1950. Detroit and Baltimore were those destination cities until 1970 or so. Huge population growth in large cities is a pre-WWII effect and its an outside the US effect. Last time NYC had Shenzhen-like population growth was over a century ago.