Historically significant Australian Christians have included the Reverend John Dunmore Lang, Saint Mary MacKillop, Catherine Helen Spence, Pastor David Unaipon, the Reverend John Flynn, Pastor Sir Doug Nicholls and General Eva Evelyn Burrows of the Salvation Army. High-profile contemporary Australian Christians include Tim Costello; Baptist minister and current CEO of World Vision Australia; Frank Brennan, Jesuit human rights lawyer; John Dickson, historian and founder of The Centre for Public Christianity; Cardinal George Pell, the Vatican's Prefect of the Secretariat for the Economy; Phillip Aspinall the current Archbishop of Brisbane, Philip Freier the current Anglican Primate of Australia and Archbishop of Melbourne; and recent Prime Ministers John Howard, Kevin Rudd, Tony Abbott and Scott Morrison.