To do things for themselves, and maybe just contribute their additions to it. Before Wikipedia, nobody really had a strong intuition on how this works like. Now, we have Wikipedia, and we have many other great open source and open content projects, the Creative Commons, things like that. People can start now. Imagine about, for example, WikiHows, about WikiFarm, agriculture, and things like that, about how to build basic, sustainable living quarters together, using nothing but non-patented, non-patent-encumbered, open source technologies, 3D printing, and very accessible technologies.