 Most recently, Mumford co-authored, with Rani Lill Anjum, "Getting Causes from Powers" (2011).The late philosopher George Molnar (1934–1999) published only four philosophical papers on metaphysics in his career, but his importance in the field should not be underestimated.After a return to the field, following a self-imposed absence, he was working on a book ("""") and continued up until his sudden and untimely death in August 1999.