Later in his life, Salk made a provocative observation, one that addresses the two forms of climate crisis. “It’s interesting to reflect,” he said, “that if all the insects were to disappear from the earth, within fifty years all other forms of life would end.” He understood, as Rachel Carson did, that the insects we spend so much effort trying to eradicate are essential threads in the intricate web of life on Earth. “But,” Salk went on, “if all human beings were to disappear from the earth, within fifty years all other forms of life would flourish.”
