Inspired by this thread.
Between 1950-2010, Detroit went from 1.8 million people to about .7 million. During that same period, New York went from 7.8 million to 8.2 million.
The Challenge: With a POD no earlier than 1950, make the 2010 population of the New York City, or rather the area which the OTL city covers, around 3 million. The primary cause of this depopulation must not be death and destruction, although a little death and destruction is allowed during the process[1]. You can change borders, but at least part of the original city must still be called New York City in 2010, and all of the people in the OTL boundaries are counted towards the population goal [2].
Please, also list the three to five largest cities in the U.S. in 2010 (inc. New York as applicable), and give a good estimate of their populations and what they're like.
It is not necessary to reverse Detroit, you can do anything you want to any other place in the world. You are also welcome to keep the population of the New York metro area the same as OTL, meaning everyone just moved to the suburbs.
---
[1] In other words, no nuclear attacks, massive hurricanes, floods, foreign invasions, epidemics, etc. But, if a riot or two or more happens during the process, that probably can't be avoided.
[2] In other words, you can't make the population of NYC 3 million just by having Brooklyn, Queens and Staten Island secede in 2009.
Between 1950-2010, Detroit went from 1.8 million people to about .7 million. During that same period, New York went from 7.8 million to 8.2 million.
The Challenge: With a POD no earlier than 1950, make the 2010 population of the New York City, or rather the area which the OTL city covers, around 3 million. The primary cause of this depopulation must not be death and destruction, although a little death and destruction is allowed during the process[1]. You can change borders, but at least part of the original city must still be called New York City in 2010, and all of the people in the OTL boundaries are counted towards the population goal [2].
Please, also list the three to five largest cities in the U.S. in 2010 (inc. New York as applicable), and give a good estimate of their populations and what they're like.
It is not necessary to reverse Detroit, you can do anything you want to any other place in the world. You are also welcome to keep the population of the New York metro area the same as OTL, meaning everyone just moved to the suburbs.
---
[1] In other words, no nuclear attacks, massive hurricanes, floods, foreign invasions, epidemics, etc. But, if a riot or two or more happens during the process, that probably can't be avoided.
[2] In other words, you can't make the population of NYC 3 million just by having Brooklyn, Queens and Staten Island secede in 2009.