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, along with several other prominent metaphysicians, including David Armstrong, contributed jointly to offering insights into Molnar's work and his character, while Mumford handled the editing and wrote an introductory chapter to accurately present and introduce the material, a task that Molnar had not completed before his passing. Armstrong notes, "We owe a great debt of gratitude to Stephen Mumford for compiling a volume from our collective efforts.