Believe it or not, the United States used to be the cycling capital of the world. So how did we end up in the hellscape we’re in today?

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In the most hotly anticipated crossover event since the Avengers joined forces with the Marvel Cinematic Universe — at least to niche urbanist YouTube nerds! — beloved content creators Climate Town and Not Just Bikes have finally teamed up.

With their powers combined, the two channels created the ultimate 30-minute explainer on how so much of America spiraled not just into car dependency, but into out-and-out hostility towards people on two wheels and any infrastructure that supports them.

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But the story isn’t just about how our nation “morphed into a series of car countries with a country problem,” as Williams puts it. It’s also about anti-bike lane bias from some cyclists themselves, bizarre backlash from neighbors who literally compare new lanes to 9/11 and (gasp!) even a little hope for the future.

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As always, bonus points if you spot the Streetsblog USA cameo.

Watch this video on YouTube.