Chapter 1 reviews the meaning of fake news, post-truth, propaganda, disinformation, and misinformation. It engages with theoretical questions related to social construction theory and propaganda. The chapter situates the book within a larger sociohistorical framework recognizing the history of American war propaganda pertaining to US official rhetoric, the news media, and public opinion, and how propaganda has been used to manipulate the public into supporting US foreign conflicts. It also examines the conditions under which people question war propaganda. The chapter reviews scholarly works covering post-truth, fake news, disinformation, and misinformation. It also discusses the rise of “new media” – particularly social media and the impact they have on rising public misinformation in American politics. A review of competing works discusses the potential of social media to empower and disempower the public. Social media are used to connect people to politics and each other and to help organize social movements. But they have also fueled a political culture of paranoia, conspiracies, and anti-intellectualism, which are perpetuated by rising disinformation embraced by both political parties – but primarily on the American right.