system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How did Detroit become the undesirable city that it is now?

I heard it was like any other large cities back in early history. Why is it the only large city that turned out with the most crimes and negative stereotypes?
gpt
The city was built and supported by the growing auto industry. In the 70's and 80's a lot of external factors (rising prices, competition, new labor laws etc) forced most of the car companies to change their business models/move somewhere else. This means a lot of the manufacturing plants in Detroit were shut down and all of a sudden you had a large percentage of the population unemployed with nowhere to go. The cities economy started to suffer and has never fully recovered back to the state it was in in it's glory days.

There's a lot more to it than that, people have written entire books on the decline of Detroit. There's a lot of socioeconomic analysis that can be put into it, but that's the basics.