Using wikis and digital fabrication tools, TED Fellow Marcin Jakubowski is open-sourcing the blueprints for 50 farm machines, allowing anyone to build their own tractor or harvester from scratch. And that’s only the first step in a project to write an instruction set for an entire self-sustaining village (starting cost: $10,000). (Recorded at TED2011, March 2011, in Long Beach, CA. Duration: 4:11)