This book examines the legal and political context of European Union regulation of agricultural biotechnology, using the case of genetically modified organisms (GMOs) as a classic example of the challenges and convoluted problems that public regulators in general, and EU regulators in particular, face when confronted with technological risks in a globalized risk society. Focusing on the GMO reform of 2015, the book explores possible ways forward in EU risk regulation, their legitimacy, effectiveness, and their very legality under the current framework of EU internal market law. It discusses the evolution and challenges of EU risk regulation in the internal market, the administration of GMO risks, the EU legal framework for GMO authorization and its implementation in practice, and exit options from EU harmonized rules, including the 2015 opt-out reform of GMO legislation.