This chapter explores a line of influence in the architecture of American intentional communities from the Associationist movement of the nineteenth century down to the hippy communes that emerged in 1965, built, after Drop City, around the shape of the geodesic dome. This hippy modernism borrowed freely from the ideas of Charles Fourier and Buckminster Fuller and fostered a community that included Stewart Brand, who went on to think about the shape of space colonies and early models of the Internet.