This is a draft of an article that has been accepted for publication in Volume 49(3) of the Monash University Law Review. The fully-edited final and citable version of the article is forthcoming. Harmonising Sexual Consent Law in Australia: Goals, Risks and Challenges Guzyal Hill * and Jonathan Crowe † Abstract The 2021 Australian of the Year, Grace Tame, sought to persuade ‘all governments across Australia to adopt the same definitions of consent, grooming, the age of a child, and sexual intercourse’. However, sexual consent law harmonisation in Australia faces formidable obstacles. We argue that an affirmative consent standard represents the appropriate goal of harmonisation, while potential risks include levelling-down reforms and undermining the role of competitive federalism. We identify four main obstacles to legal harmonisation, including strong advocacy coalitions, jurisdictional differences, historical failures and political disincentives. We conclude these obstacles do not mean harmonisation is undesirable or impossible, but it would require prolonged attention, resources and political will, as well as a nuanced understanding of the difficulties involved. Keywords: Sexual consent, rape, sexual assault, sexual violence, affirmative consent, legal harmonisation, advocacy coalitions, law reform * Senior Lecturer, Asia Pacific College of Business and Law, Charles Darwin University. The authors thank the anonymous referees for their helpful comments and suggestions. † Professor of Law, Bond University.