The world's largest shopping days (Black Friday, Singles Day in China, Prime Day online, and so on) means shipping lots and lots of boxes, via big-box retailers and container ships -- but that's not the only reason we're re-running this episode of the a16z Podcast from 2017 with The Box author Marc Levinson. It's because we love logistics and infrastructure, and is really about how global innovation happens... through all sorts of invisible details.