"A Letter on Justice and Open Debate", also known as the Harper's Letter, is an open letter defending free speech published on the Harper's Magazine website on July 7, 2020, with 153 signatories,[1][2][3] criticizing what it called "illiberalism" spreading across society. While the letter denounced President Donald Trump as "a real threat to democracy", it argued that hostility to free speech was becoming widespread on the political left as well.[3]