Dan's involvement in intactivism grew out his commitment to equal rights; he fought to help pass the Equal Rights Amendment in Indiana when he was in college. "Circumcision was an issue I could relate to—not only because I was circumcised, but because of the equal rights aspect. For most of my life I’ve been troubled by night terrors that I later became convinced were an early recollection of my circumcision at age three-days."
Dan is the author of the paper "The lost boys", which presented an estimate over the number of yearly deaths in the United States as a result of neonatal circumcision. This paper and the figure has been controversial, as some in the intactivist community refer to it as a fact rather an estimate.