Who was it that came up with the first optimal city size?

Question

I'm looking for a study for my Dad. Back in the 1960's, he read a study that posited the optimal size for a community was about 5000 people. He believes the researcher's name was Brown.

Answer 1

I think your dad remembered Brown, as in Brown University. try a google search using this entry, optimal city size brown

Answer 2

France i think