A thought-provoking work by a singular voice, this short, sharp essay invites us to critically reconsider power, ideology and the boundaries of free speech. Invisible, invasive and widely taken for granted, censorship is a globalized force as much driven by commercial interests as political agendas. Ai Weiwei - artist, activist and one of the world's most influential cultural figures - has first-hand experience of its power. In this urgent piece of writing, he makes a rallying cry for free speech in an age shaped by big data, mass surveillance and intrusive new technologies of control. Ai Weiwei examines how censorship persists both in the overt propagandizing and redactions of authoritarian regimes, as well as subtly within democratic frameworks, exploring how international corporations, cultural institutions, social media and so-called ideologies of 'freedom' have provided fertile ground for new, more insidious, suppressions.