Includes bibliographical references and index.

Introduction / Katharine Gelber and Susan J. Brison -- Digital dualism and the "speech as thought" paradox / Katharine Gelber and Susan Brison -- Search engines and free speech coverage / Robert Simpson and Heather Whitney -- Cyber harassment and free speech : drawing the line online / James Weinstein -- Recipes, plans, instructions and the free speech implications of words that are tools / Frederick Schauer -- Free speech categories in the digital age / Ashutosh Bhagwat -- Privacy, speech and digital imagination / Robert Post -- Why combatting online abuse is good for free expression / Danielle Keats Citron -- "Not where bodies live" : the abstraction of internet expression / Mary Anne Franks -- Demographics, design and free speech : how demographics have produced social media optimized for abuse and the silencing of marginalized voices / Soraya Chemaly -- Unmasking hate on twitter : disrupting anonymity by tracking trolls / Diana Ascher and Safiya Noble -- Online dating sites as public accommodations : facilitating racial discrimination / Sonu Bedi -- The meaning of silence in cyberspace : the authority problem and online hate speech / Alexander Brown -- Regulating online speech : keeping humans, and human rights, at the core / Dinah PoKempner -- .