>>1585459>racismLOL, not it wasn't "racism," it was actual violence, crime, and decay caused by certain groups that led to "white flight" which is what created the suburbs. Part of it was also due to desegregation, and parents wanting their kids in better school districts, which just happened to be the all-white ones in the suburbs. In cities and certain counties, bussing was instituted making even white parts of diverse cities not able to have white-majority schools, so whites had to move as far away as they could afford to avoid the bussing-form of desegregation (which is where non-white students were bussed to go to majority-white schools, to level out testing averages, because entirely non-white schools performed poorly).
The advent of cheap cars and oil in the post-war era then sped up the process as it was now easy to have your own car and drive into the city 40, 50 miles, etc. and go to work, and then come home to your own house on a fair bit of land with private amenities. You can contrast American development with European development as individualism vs. collectivism, with narcissism driving American urban planning and development (which isn't necessarily bad). Public transportation of course was also campaigned against in America because of its effect on desegregating regions, allowing cheap transport. The automobile barrier to entry allowed segregation to stick around until Section 8-style affordable housing was implemented in the suburbs more recently, along with the current days of easy credit.
America did try what Europe did, and build massive housing projects, and collectivization schemes, but they largely failed, due to multiracialism. The housing projects in cities became undesirable and dangerous, whites left first, and then the poorest and criminal stayed behind, blighting these developments. Furthermore, the well-to-do never were attracted to housing projects anyway, so the scheme was already from the start beset by a demographic issue.