Who was the first enviormentalist ever to live?

While it's challenging to pinpoint a single "first environmentalist," many consider figures like Henry David Thoreau, who wrote "Walden" in the 19th century, as early advocates for nature preservation. However, indigenous peoples around the world have practiced and promoted sustainable living and stewardship of the land for millennia. Additionally, philosophers like John Muir in the late 19th century significantly influenced the conservation movement, emphasizing the importance of nature. Thus, the concept of environmentalism has deep historical roots across various cultures.