The scope and reach of social media and other online platforms has forced officials and citizens to recalibrate traditional boundaries between public and private regulation of speech, between local and global harms, and between speech and conduct. The balance of harms associated with regulation of defamation, political campaign speech, and hate speech requires new thinking, and charting a path forward will require collaboration between lawyers, political scientists, technologists, journalists and communications specialists, politicians, business leaders, and ordinary citizens. This panel brings into conversation scholars with a broad range of expertise in law and politics, technology, and freedom of speech to unpack these new threats to democracy and what we can do about them.