[1] In 1956, MacCallum and his grandfather founded the Science of Society Foundation, which published a number of works, including Heath's book Citadel, Market and Altar.

[4] He details these ideas in his 1970 booklet The Art of Community, as well as his 2003 articles "The Enterprise of Community: Market Competition, Land, and Environment" and "Looking Back and Forward" (which describes the influence of his grandfather); and his 2005 article on stateless social organization "From Upstate New York to the Horn of Africa."

Stiefel's vision aligned with the ideas introduced by Spencer Heath, so MacCallum was the ideal person to help him develop the "constitution" for the new form of governance.

[7] In 1976, MacCallum discovered artisan Juan Quezada, who soon became the leader of the now-thriving pottery movement located in Mata Ortiz, a small town near the ancient Paquime (or Casas Grandes) ruins in the Mexican state of Chihuahua.

MacCallum lived in nearby Casas Grandes and played a key role in Mata Ortiz affairs.

Additionally, MacCallum had assisted archaeological investigations in the region by providing a compound to serve as quarters and lab space.