From the Nazi stadium propaganda in 1936 Berlin to the 1968 Mexico City podium protest of medal-winners Tommie Smith and John Carlos, who were expelled from the competition after raising their gloved fists in a Black Power salute against racial injustice, the Olympic Games have held a mirror up to some of the darkest moments of 20th-century history. Now, as the Paris Olympics prepares to open this summer against a backdrop of war from Ukraine to the Middle East – with Emmanuel Macron saying Russia will be asked to observe a ceasefire in Ukraine during the Games – a new...