Mumford, along with several other figures in the field of metaphysics, including David Armstrong, were involved collaboratively in providing insight on Molnar's work, and on him as a person, but the editing was left to Mumford, as was the writing of an introductory chapter to correctly present and establish the material laid out - something which Molnar did not get round to doing before his death. Armstrong states, "We can be very grateful to Stephen Mumford for making a volume from the much that we have.
Mumford collaborated with other notable metaphysicians, including David Armstrong, in providing commentary on Molnar's work and his personality, while Mumford oversaw the editing and authored an introductory chapter to effectively convey and organize the material, a task that Molnar had not completed prior to his death. Armstrong remarks, "We are deeply indebted to Stephen Mumford for assembling a comprehensive volume from our collective knowledge.