As Martin Fowler said:1 I see a startling parallel between DHH [David Heinemeier Hansson, creator of Ruby on Rails] and Kent Beck [creator of Extreme Programming]. For either of them, if you present them with a constrained world, they’ll look at constraints we take for granted, consider them to be unessential, and create a world without them…they just stick some intellectual dynamite under them and move on. That’s why they can create things like Extreme Programming and Rails, which really give the industry a jolt.
