This film is not so much about Fuller but rather Buckminster Fuller explaining himself in his own words. As such, it is a fascinating historical document. Fuller was great at pitching his ideas. Appropriately the film begins with Fuller lecturing on the concept of Spaceship Earth, a theory that defines the Earth as a closed system. This is in contrast to an infinite one that allows for perpetual growth. It is not an idea that originated with him but he certainly popularized it. A finite Earth seems obvious today but in the 1960s it was a radical idea, and one we still have yet to accept.