Professor Helen Irving teaches Australian and United States Constitutional Law at the University of Sydney Law School. Her current major research is on citizenship and allegiance in Australian law and history. Helen has served as the historical consultant for a number of documentaries and official projects. In 2005-2006, she held the Harvard Chair of Australian Studies as a Visiting Professor at Harvard Law School. She is a Fellow of the Academy of Social Sciences in Australia, the Australian Academy of Law, and the Royal Society of NSW.