Don Markwell is the Head of St Mark’s College, Adelaide, and an Adjunct Professor in the School of Social Sciences at the University of Adelaide. Rhodes Scholar for Queensland for 1981, he has served as Warden of St Paul’s College at the University of Sydney, Warden of Rhodes House, Oxford, Deputy Vice-Chancellor (Education) of the University of Western Australia, Warden of Trinity College at the University of Melbourne, and Fellow and Tutor in Politics at Merton College, Oxford. He has also served as Senior Adviser on Higher Education to the Federal Minister for Education, and Senior Adviser to the Attorney-General and Leader of the Government in the Senate. His books include Constitutional Conventions and the Headship of State: Australian Experience (2016).