If you think about it, we do not all have 'freedom of speech' in the careless way we think we do.
The numerous international conventions that recognize this great individual freedom today, the 'national' Declarations and Bills of Rights over the centuries that established it and the modern constitutions that enshrine it, all recognize there are limits to our right to say anything we choose. The French Declaration of the Rights of Man in 1789 stated that 'every citizen shall be responsible for abuses (of freedom of expression) as shall be defined by law.' The right, in other words, came with responsibility: there are always going to be others to consider.
How much greater is the need to make citizens 'responsible for abuses' in the enormously more complex, multi-ethnic and democratic world of today. You are not free to incite genocide under international law. In the new South Africa , you may not legally indulge in hate speech against gender, race, ethnicity or religion.
The famous First Amendment to the Constitution of the United States guaranteeing free speech is not taken to include, among other things, obscenity and criminal speech (threats and menaces, for example). The most open societies in the world restrict pornography and circumscribe what may be said or published to protect children, people's reputations and privacy.
If there are many areas where the law forbids ‘free speech', there are very many more where custom dictates we restrain ourselves. We all know we are expected to speak only kindly and considerately to our partners and children, relatives and friends, hard though that sometimes is to manage. We try, though even more often we fail here, to address business colleagues and associates civilly. Even internet posts manage from time to time to make a point without personal abuse. The examples seem trivial. But social life would be intolerable if we did not voluntarily hold our tongues in all kinds of ways every day.
Where on earth, then, did the idea come from that we can say anything we like?