What are the fifty most important machines to life as we know it?
Jucobowski sorted that out after his tractor kept breaking. He published open source blueprints that could allow you to make these things for a fraction of the cost and that should last a lifetime, not be built for obsolescence. Then people started helping him refine. He’s constructed eight of the fifty designs and gives this amazingly inspirational TED talk on unleashing human potential worldwide. Global maker culture for good. Open-sourced blueprints for civilization and a global village construction set So inspirational.
Check it out at Open Source Ecology.