The nazis

The idea was revolutionary – yet there was something ancient at its heart. The scientist Nikolai Vavilov, arriving in Petrograd in 1921 to take the helm of the Bureau of Applied Botany and Plant Breeding, was on a sacred mission: to make, in his words, ‘a treasury of all known crops and plants’. The world’s first seed bank would shape the future of agriculture – possibly even eliminate failed harvests and hunger. This was gleaming scientific idealism, but there was also an element of the Old Testament Ark about it. Throughout the siege, the botanists had to find the superhuman strength not to eat the seeds themselves The vision would

Late in his life, I asked my uncle René about his exploits in wartime France. What I knew was that my family left Paris in 1940, around the time a great-uncle was shot dead in the street by a German army officer. They headed south to the Mediterranean, where my two uncles organised a network of safe homes for fugitives to lie low in until they could be smuggled out. When I asked for details, René clammed up. ‘Those were terrible times,’ he muttered, ‘not worth remembering.’ The Guardian writer Hadley Freeman was more successful in tracing her uncles’ activities in France, set off on her trail by a shoebox