Figure: “Bazaar, Cairo, Oct-2011” by maltman23 is licensed under CC BY-SA 2.0 #Or how Blockchain gets consensus wrong. Over twenty years ago, Eric S. Raymond wrote an essay that changed the software development world. Titled The Cathedral and the Bazaar, it outlined his experience in trying to understand and emulate the success of the Linux operating system kernel. The essay set down some observations in rules that other projects should follow for similar success.