Vavilov’s disappearance from the Plant Institute led to confusion. That month the All-Union Agricultural Exhibition awarded Vavilov a gold medal for services to Soviet agriculture. His colleagues couldn’t understand why the authorities would simultaneously arrest him. They wrote letters to the Central Committee of the Communist Party, the government, and the NKVD, vouching for his character and declaring that he was no spy. But a warning came that anyone who put his or her signature to the letter would be arrested for supporting a suspected “enemy of the people."
They hoped that Vavilov’s younger brother, Sergei, director of the Optical Institute, would be able to intervene but nothing came of it. Vavilov was dismissed from his position as director of the Plant Institute. Police arrived to search his office, then his apartment. A bogus story was circulated that had he visited Ukraine with a plan to cross the border and flee to the West, taking his scientific knowledge and findings with him. Trofim Lysenko's supporters were promoted to senior positions in the Institute and Vavilov's supporters were dismissed.
All the while, Operation Barbarossa, the German plan for the invasion of Russia, had been in full swing. Nobody had any inkling that, within three months, Leningrad — formerly known as St. Petersburg — would become the setting for the longest siege in recorded history. Hitler told his military chief of staff that Leningrad was not merely to be attacked, but was to be leveled, to become “uninhabitable.” By razing the city, the German army would eliminate a center of Bolshevism and nationalism. Also, according to Hitler, the German army would be spared “the necessity of having to feed the population through the Winter." The siege of Leningrad lasted for almost nine hundred days.
The tactic to besiege a city is to soften up the people living there and to stop food and supplies entering the city. Starvation and hunger began in earnest as soon as the siege ring closed. It's estimated that upwards of one million people died, four times the number that died in the atomic bombings of Nagasaki and Hiroshima combined. In 1942, every third person living in the city perished. Most died from starvation.
Vavilov had instilled in his followers a keen sense of responsibility; many of the specimens in the seed bank, he taught them, were as irreplaceable as precious artworks. They could not easily be re-collected or, in some cases, replaced at all, as the landscapes from which they had been harvested had already been destroyed by human activity. His staff understood that preserving the collection was now their primary goal.
Although the siege of Leningrad is very well documented, it was not known for a while because there was a state-wide cover-up to minimize the amount of casualties and the suffering that had happened in the city. But by the 1960s and 1970s the details started coming to light from people who had kept diaries. These showed what it was like throughout September, October, November of the first few months of the siege. The cupboards started to empty, as the people started to face the terrible decision of maybe butchering their pets or doing whatever it is that they needed to do in order to get some calories into their bodies to prepare for the winter.
These diaries were by ordinary people but the botanists who worked at the Plant Institute did not keep the same kind of records. Much of the information about them comes from the things that they wrote in the years afterwards, which were much more plain, perhaps because they were government employees. But what comes through is that, throughout this ordeal, these scientists overcame hunger and injury and risked their lives to protect the world's first seed bank. They were literally starving during the siege and yet they refused to eat the very seeds they were safeguarding throughout it.
It was a brutal winter in 1941 and more calories were needed in trying to stay alive in such cold temperatures. But the botanists made a collective decision that they're not going to touch any of the seeds. There were more than a quarter of a million seeds and plants inside the Institute in little tins. Many of them were edible. There were nuts and things that they just could have taken off the shelf and eaten on the spot which would have prolonged their lives. Instead, they gathered up the seeds and put them in two of the rooms, stacked them up, and then bolted the door shut so that no one could get in and touch them.
Some of them died while at their desks while continuing their work. One scientist was found slumped at his desk and when one of his colleagues tried to rouse him by shaking his shoulder, a packet of almonds spilled out of his hands. He had died while sorting through these almonds and cataloging them while resisting the urge to eat them and stay alive. What is it that drove the scientists to such extreme levels of self-sacrifice that resulted in the loss of life of 19 of the botanists who worked there?
They knew that some of these seeds were irreplaceable, priceless. The habitats where some of these seeds had been collected had been lost and there was no way to get them back. So eating them would have been a betrayal of that work and of their colleagues. There was a sense that this was their life's work. After the war, a journalist asked why they chose not to eat the seeds or give them to the starving people. One of the botanists said (as quoted in The Forbidden Garden):
Imagine this scenario: Here you are, a writer, who has authored a book. You’ve put your all into it — your whole life. And suddenly, let’s say, there is a severe frost, and you find yourself in a room without firewood to keep warm, only your manuscript.… Now can you begin to understand the psychology of the situation? You are freezing to death: Will you destroy this, the only copy of your book? Would you die to preserve this work? Yes, or no? Will you give in to temptation?
What are you asking me, you and all the others? You’re surprised? You’re perplexed? Yes, it was difficult to walk at that time. It was unbearably difficult to get up every morning, move your hands and feet.… But to refrain from eating the collection? That wasn’t difficult. No, not at all. Because it was impossible to eat your life’s work, the life’s work of your friends and colleagues. Do I really need to prove such an elementary, simple thing to you?