Question: An Irish philosopher and an English philosopher had what issue between them? 
Context: Philip Noel Pettit (born 1945) is an Irish philosopher and political theorist.  He is Laurence Rockefeller University Professor of Politics and Human Values at Princeton University and also Distinguished University Professor of Philosophy at the Australian National University.  He was a Guggenheim Fellow. Mark Dooley (born 12 January 1970) is an Irish philosopher, writer and newspaper columnist.  A specialist in continental philosophy, theology and the philosophy of religion, he is the author of several books, including "The Politics of Exodus: Kierkegaard's Ethics of Responsibility" (2001), "Roger Scruton: The Philosopher of Dover Beach" (2009), and "Why Be a Catholic?"  (2011). Cahal Brendan Daly (1 October 1917 – 31 December 2009) was an Irish philosopher, theologian, writer and international speaker and, in later years, a Cardinal of the Roman Catholic Church. Jitterbug Perfume is Tom Robbins' fourth novel and was listed on the "New York Times" Best Seller list in 1985.  It is widely considered a cult classic and one of the "Best books of the 20th century".  The book follows two interweaving storylines, one in Ancient Eurasia and one in the present-day.  Darkly humorous and "presented in an idiosyncratic fictional style", the story connects dueling perfumers in Seattle, Paris and New Orleans to a bottle of incomparable perfume created by two unlikely but defiant lovers of the past who seek immortality.  Orchestrated by a mysterious Irish philosopher, the past and the present collide when the characters come together and discover the unexpected path to life-everlasting.  The book was first published in 1984 by Bantam Books and later published by Random House. The Rev. Francis Hutcheson (8 August 1694 – 8 August 1746) was an Irish philosopher born in Ulster to a family of Scottish Presbyterians who became known as founding fathers of the Scottish Enlightenment. John Gay (1699–1745), a cousin of the poet John Gay, was an English philosopher, biblical scholar and Church of England clergyman.  The greatest happiness principle, Gay supposed, represented a middle ground between the egoism of Hobbes and Hutcheson's moral sense theory. Cathal Ó Matadain, Irish philosopher, died 1343. Martin Ferguson Smith OBE, MA, MLitt, LittD (Dublin), FSA, FRGS (born April 26, 1940) is an Irish philosopher, and epigraphist. Alciphron, or The Minute Philosopher is a philosophical dialogue by the 18th-century Irish philosopher George Berkeley wherein Berkeley combated the arguments of free-thinkers such as Mandeville and Shaftesbury against the Christian religion.  It was first published in 1732. Dermot Moran ( ) is an Irish philosopher specialising in phenomenology and in medieval philosophy and also active in the dialogue between analytic and continental philosophy.  He is currently Professor of Philosophy (Metaphysics and Logic) at University College Dublin.  He previously taught at St. Patrick's College, Maynooth, Queen's University of Belfast, and Yale University.  He has served as a visiting professor of philosophy in many universities around the world, including Rice University, Sorbonne, University at Albany, SUNY, Catholic University of Leuven, Trinity College Dublin, Connecticut College, Ludwig Maximilian University of Munich and Northwestern University.  He has been an elected member of the Royal Irish Academy since March 2003 and has been involved in the Fédération Internationale des Sociétés de Philosophie, the highest non-governmental world organisation for philosophy, since the 1980s.  He is the Founding Editor of International Journal of Philosophical Studies, founded in 1993 and published by Routledge, and co-editor of Contributions To Phenomenology book series, published by Springer.  His monograph Introduction to Phenomenology was awarded the Edward Goodwin Ballard Prize in Phenomenology (2001) and was translated into Chinese.  A Turkish translation of the book is in preparation.  Moran has also been elected President of the Programme Committee for the 23rd World Congress of Philosophy which took place in Athens from 4–10 August 2013.
Answer: egoism