* The return of soldiers from the war to their home countries.
* The growth of the manufacturing industry, which created jobs in cities.
* The decline of agriculture, which pushed people to move to cities in search of work.
* The expansion of transportation networks, which made it easier for people to move to cities.
* The rise of the welfare state, which provided social safety nets for people who moved to cities.
Post-war urbanization had a significant impact on the built environment of cities. In many cases, slums and shanty towns grew up around cities as people moved in from the countryside. The rapid growth of the urban population also put a strain on city services, such as housing, water, and transportation.
In the decades since the Second World War, post-war urbanization has continued in many countries. The urban population of the world is now estimated to be over 50%, and it is expected to continue to grow in the years to come.