Jonathan is an ethologist and author. He was Director of Animal Sentience with the Humane Society Institute for Science and Policy and Department Chair for Animal Studies with Humane Society University. He lectures internationally on animal behavior and the human-animal relationship. Jonathan also served as Associate Editor of the journal Animal Sentience from 2015 to 2019.
Jonathan's books include: The Use of Animals in Higher Education; Pleasurable Kingdom: Animals and the Nature of Feeling Good; Second Nature: The Inner Lives of Animals; What A Fish Knows and SuperFly.
Jonathan is vegan and has written extensively about the reality and moral salience of non-human animal sentience. He seems to have a naturalistic, scientific worldview.