
The idea of free speech sparked into life 2,500 years ago in Ancient Greece – in part because it served a politician’s interests. The ability to speak freely was seen as essential for the new Athenian democracy, which the politician Cleisthenes both introduced and benefited from.
Today, we debate the boundaries of free speech around kitchen tables and watercoolers, in the media and in our courtrooms. The right to freedom of thought, however, is more rarely discussed. But thanks to the growing influence of social media, big data and new technology, this “forgotten freedom” needs our urgent attention.