The image features a tweet by Dan Savage discussing the concept of cities older than 100 years being originally car-free. He is quote tweeting Donald Shoup who posted about Culdesac, AZ, being the first car-free city built from scratch, along with a URL to an article.
https://s3.eu-central-2.wasabisys.com/mastodonworld/media_attachments/files/113/159/486/504/810/973/original/e2fddac9a8f6e3f8.jpeg