Source: April 22, 2025 – by Heather Cox Richardson
EARTH DAY
Today is Earth Day, celebrated for the first time in 1970. The spark for the first Earth Day was the 1962 publication of Rachel Carson’s Silent Spring. A marine biologist and best-selling author, Carson showed the devastating effects of people on nature by documenting the effect of modern pesticides on the natural world. She focused on the popular pesticide DDT, which had been developed in 1939 and used to clear islands in the South Pacific of malaria-carrying mosquitoes during World War II. Deployed as an insect killer in the U.S. after the war, DDT was poisoning the natural food chain in American waters.
DDT sprayed on vegetation washed into the oceans. It concentrated in fish, which were then eaten by birds of prey, especially ospreys. The DDT caused the birds to lay eggs with abnormally thin eggshells, so thin the eggs cracked in the nest when the parent birds tried to incubate them. And so the birds began to die off.
Carson was unable to interest any publishing company in the story of DDT. Finally, frustrated at the popular lack of interest in the story behind the devastation of birds, she decided to write the story anyway, turning out a highly readable book with 55 pages of footnotes to make her case.
When The New Yorker began to serialize Carson’s book in June 1962, chemical company leaders were scathing. “If man were to faithfully follow the teachings of Miss Carson,” an executive of the American Cyanamid Company said, “we would return to the Dark Ages, and the insects and diseases and vermin would once again inherit the earth.” Officers of Monsanto questioned Carson’s sanity.