[8] With Arthur Caplan, Arp edited Contemporary Debates in Bioethics[9] through John Wiley & Sons, containing new papers written by experts in bioethics and applied ethics such as Don Marquis, Tom Beauchamp, Mark Cherry, William J. Winslade, Jane Maienschein, Edwin Black, Richard Arneson, and others.

"[11] His article with Barry Smith titled "Function, role and disposition in basic formal ontology" published in Nature Precedings has been cited more than 140 times, according to Google Scholar.

"[18][19][20] While this view has been applauded as "innovative and interesting,"[21] a "valuable resource and a stimulating contribution,"[22] and even "ambitious,"[23][24] there are those who critique Arp's position as "saying nothing new"[25] and suffering from "a form of selectivity deficit – an inability to judge what is and isn't relevant to his claims.

"[26] Arp's view continues to be referred to as plausible by cognitive scientists[27][28][29] and others doing work in artificial intelligence,[30][31][32][33] philosophical psychology,[34] and other areas of study.

Arp has also used RDF, RDFS, OWL, and SPARQL to assist in building ontologies for the Next Generation Air Transportation System, making use of ontology-building tools such as TopBraid and Protégé.

[55] However, cognizant of the difficulties surrounding a realist position (especially for practical, working ontologists),[56] Arp has argued for a form of as-if philosophical realism, along the lines of Immanuel Kant and Hans Vaihinger whereby the "commitment to the pursuit of abstract objects could become instrumental in guiding the life of philosophy and science in a limited as if manner.

Deriving its modern usage from the French solidarité meaning "communion of interests and responsibilities" or "mutual responsibility," the concept of solidarity was championed by Émile Durkheim in his De la division du travail social: étude sur l'organisation des sociétés supérieures (The Division of Labor in Society, 1893).

There, Durkheim envisions solidarité as a kind of human fraternity dependent upon the existence of personal bonds, which are needed for the realization of common goals or ideals within groups.

Durkheim was part of numerous Judeo-Christian ethical and political systems that responded to the Industrial Revolution at the close of the 19th century.

Religious beliefs are part of the very fabric of human existence, so if a religious-based ethical sentiment can be harnessed—as one finds in solidarity—and used as a motivator for confronting environmental injustice, then it is more likely to be enduring.

He has worked numerous times with William Irwin, General Editor of The Blackwell Philosophy and Pop Culture series[70] through Wiley-Blackwell (publisher).

In 2006 Arp edited the flagship book in that series, South Park and Philosophy: You Know, I Learned Something Today, which has been translated into the Italian,[71] the Turkish, and Portuguese.

[79][80] Arp's edited book, 1001 Ideas That Changed the Way We Think, was published through Simon & Schuster in 2013 and has sold thousands of copies worldwide in English, French, German, Italian, Portuguese, and Czechoslovakian.