Who raised the slogan back to nature?

The slogan "Back to Nature" was popularized by the 19th-century American transcendentalist movement, particularly by figures like Ralph Waldo Emerson and Henry David Thoreau. This philosophy emphasized a return to natural living and self-reliance, advocating for a simpler life in harmony with the environment. The slogan also resonated with various 20th-century movements, including the organic farming and environmentalist movements, which sought to promote sustainability and reconnect with the natural world.