by Carlos Blanco de Morais (Editor), Gilmar Ferreira Mendes (Editor), Thomas Vesting (Editor) - Introduction. - Part I Democratic Constitutionalism in Cyberspace. - "Digital Democracy" A Threat to the Democratic System or Oxygenation of Representative Democracy and Free Speech?. - Digital Constitutionalism and Constitutional Jurisdiction: A Research Agenda for the Brazilian Case. - The Crisis of the Representative Democracy in the Face of Digital Democracy. - Rule of Law, Democracy and New Technologies. - Freedom, Democracy, Digital Government and Human Development. - The Digitization of Government and Digital Exclusion: Setting the Scene. - The Impact of Artificial Intelligence on the Structures of the Modern Public Sphere. - Part II The Threat of Disinformation and the Role of Social Networks. - Fake News and the 2018 Brazilian Presidential Election. - Political Speech, Freedom of Expression and Fake News. - Disinformation and Journalism. - Social Networks and the Exercise of Fundamental Rights: Public Administration and the Digitalization of Fundamental Rights. - Freedom of Expression in the Age of Digital Platforms: Change of Paradigm?. - Online Hate Speech and the Role of Digital Platforms: What Are the Prospects for Freedom of Expression?. - Hate Speech and Social Media. - Don't Shoot the Message: Regulating Disinformation Beyond Content. - Models of Legal Liability for Social Networks: Between Germany and Portugal. - Self-Regulation and Public Regulation of Social Networks in Portugal. - Cyber Courts for Social Media As a New Institutional Dimension of Media Freedom?. Back Jacket The rule of law in cyberspace currently faces serious challenges. From the democratic system to the exercise of fundamental rights, the Internet has raised a host of new issues for classic legal institutions. This book provides a valuable contribution to the fields of international, constitutional and administrative law scholarship as the three interact in cyberspace. The respective chapters cover topics such as the notion of digital states and digital sovereignty, jurisdiction over the Internet, e-government, and artificial intelligence. The authors are eminent scholars and international experts with a profound knowledge of these topics. Particular attention is paid to the areas of digital democracy, digital media and regulation of the digital world. The approach employed is based on a comparative perspective from Germany, the Netherlands, Italy, Portugal and Brazil.