Ok, well agree with some of that and disagree with some. There's definitely social aspect which is if you see your friends and colleagues biking, it enters your Overton window. My neighbor started biking downtown for work recently in part because she saw my partner doing it every day.

(There is a protected off-street bike path most of the way, and the infra has not changed.) On the other hand, I don't believe what happened in Paris, or Seville, or the NYC river crossings was just an unprompted shift in culture. I think infrastructure started those trends, even if...