A man ahead of his time, renowned cellular biologist Barry Commoner (1917–2012) was born on this day in Brooklyn, New York.

He once said, “No action is without its side effects.” A powerful truth that sparked a lifetime of advocacy. A leader in the environmental movement, he helped raise awareness about pollution, toxins, and the interconnectedness of all living systems.

Commoner promoted the use of solar energy and wrote the groundbreaking book Science and Survival (1966), calling for a new, responsible relationship between science, society, and the Earth.

"Nature knows best," he said.

In 1970, Time magazine dubbed him “the Paul Revere of Ecology.” A decade later, he ran for president under the Citizens' Party, continuing his crusade for cleaner air, safer products, and environmental justice.

His core belief, that everything is connected, resonates more than ever. The balance of nature continues to depend on how wisely we live today.