We do not tolerate people with whom we agree – the word itself indicates that it is people with whom we disagree. But we support their right to hold and express their world-view, provided it is without threat or incitement to violence. However, in many countries tolerance has degenerated into a simplistic, all-affirming political correctness: a debilitating and very dangerous attitude that prevents people saying what they believe in case anyone should take offence. It is the very antithesis of free speech, and it is having a paralysing effect on public discourse.