Steve Jobs called It “the most amazing piece of technology since the PC.” According to Jeff Bezos It was not only “revolutionary,” but infinitely commercial. It was a fiendishly clever and massively hyped invention. But in the end It — also known as the Segway — was a failure.

What makes an invention useful and valuable? Jimi Heselden’s pragmatic brainchild the Concertainer might hold the answers. First used to shore up the collapsing walls of a canal, it ultimately solved problems that Jimi had never even imagined.

For a full list of sources for this episode, go to timharford.com

If you’d like to keep up with the most recent news from this and other Pushkin podcasts, be sure to sign up for our email list at pushkin.fm.