Spencer MacCallum tells about the legacy of Spencer Heath, his grandfather, from whom he learned libertarian ideas and understood the importance of the community. Beginning by talking about his family background, he details the special bond he shared with whom he referred to as an unknown philosopher, and who amongst other things, collaborated in the design of the first rotary engine used in helicopters, founded the American Propeller Manufacturing Company, and aided in the First World War.

MacCallum decided to make his life mission to watch that his grandfather's ideas did not get lost, and consequently, expounded and popularized his work on the book The Art of Community, and with his libertarian background, worked extensively on the philosophy and design of communities, in which he believed rested the importance of living in society.