High Quality Content by WIKIPEDIA articles! David Patrick Moran (22 March 1869 – 31 January 1936), better known as simply D. P. Moran, was an Irish journalist, activist and cultural-political theorist, known as the principle advocate of a specifically Gaelic Catholic Irish nationalism during the early 20th century. Associated with the wider Celtic Revival, he promoted his ideas primarily through his journal, The Leader and compilations of his articles such as the book The Philosophy of Irish Ireland.