John Walker is one of Canada's best known documentary film-makers.
His latest work is Assholes: A Theory. The film is a direct response to psychology professor Aaron James' witty bestseller about why some people are assholes and how to deal with them - in an age when the trait seems to be on the rise.
John Walker's films have been widely broadcast and have appeared at major international film festivals in Toronto, Vancouver, New York, Los Angeles, Berlin, London and Tokyo.
He has received over 60 Canadian and international nominations and awards for his writing, directing, producing and cinematography. Assholes: A Theory is screening in Auckland and Wellington as part of the Documentary Edge International Film Festival.