BLOG > What Is the Black Swan In Never Split the Difference? by Arthur Worsley M.A. Psychology, Oxford. McKinsey Alum. Founder & Editor at TAoL. Arthur Worsley I founded TAoL to discover and share the best wisdom on how to live long and prosper. Before that I studied Psychology, Philosophy & Physiology at Oxford and consulted at McKinsey. Still curious? Learn more or take my FREE productivity quiz.