In Frank Capra’s It’s a Wonderful Life, the protagonist, a socially-minded small town banker facing disgrace and ruin, is contemplating suicide. As he stands on a bridge readying to take the fil plunge, he wishes he had never been born in the first place. A passing angel intervenes, showing the protagonist how he had touched many lives with his kindness and compassion. At the end of this inspiratiol 1940s film, the protagonist realizes that his had, in fact, been a life well lived — that the histories of the people he had known and loved, his town and even his country, would have been far different and darker had he never existed. This is true for every human, more so if he or she has the belief to make a difference when the situation so arises. But what can we say about a man credited with saving the world from a nuclear armageddon? Far from being a Hollywood fantasy, it is the true story of a Soviet army officer who breathed his last in May this year, but whose passing was so quiet that it came into news only last week. On what would have been a fateful night of September 26, 1983, lieutent colonel Stanislav Petrov was on duty at a top secret underground bunker a little south of Moscow. His job was to monitor the enemy missile early warning system, to which a new satellite network had lately been added. Suddenly, an alarm went off and Petrov saw on the computer screen that five nuclear missiles launched by the US were heading straight for his country. As over a hundred subordites panicked, Petrov coolly took a call. He had been exhaustively drilled to report any such attack immediately to his superiors; the protocol was such that they would not question his judgment but pass the alarm straight up the hierarchy. This ‘hair trigger’ retaliation would have culmited in the top authorised Soviet leader pressing the nuclear button.