As we mark the passing of Mr Gorbachev, it is concerning to see Russia ignoring the lessons on his legacy, including a new threat of nuclear disaster at Zaporizhzhia nuclear power plant in Ukraine. With this in mind it's fitting to end with Mr Gorbachev's own words: "There will be no winner in a war of all against all, particularly if it ends in a nuclear war. Faced with this dire threat to peace, we are not helpless. We must not resign. We must not surrender".