As Director of the Sigmund Freud Archives after his death and with full access to Freud's correspondence and other unpublished papers, his insights could be seen to be compelling.
However, he is best known for his books on animals and animal rights.
Listen to a staunch advocate for animals, especially farm animals, cows, pigs and poultry and the problems with factory farming, particularly overseas.
With human separation from nature and the many unconscious practices that are predominant today, can we mitigate this by more animal rights and migrating to eating less meat to becoming a vegan?
He is currently an Honorary Fellow in the Department of Philosophy at the University of Auckland in New Zealand.