John Muir is known as the father of the US National Park System (NPS), of which El Yunque National Forest (EYNF) is a part for over a century. He was the founder of the Sierra Club. He was key in saving the awesome  Yosemite National park.

Muir was noted for being an ecological thinker, political spokesman, and religious beacon, whose writings became a personal guide into nature for countless individuals, making his name synonymous to the  modern environmental consciousness.

He truly was a visionary, and saw the dangers coming from overdevelopment and uncontrolled greed.  Originally he did not want to be in society, but friends asked him to take a part in it for the benefit of all.

Muir experienced our oneness with the earth, and did his best to save the American soul from total surrender to materialism.

We have the park system, now in peril, thanks to his efforts and books.  I recommend as a must-read book this jewel: 

In 1867, Muir undertook a walk of about 1,000 miles (1,600 km) from Kentucky to Florida, which he recounted in his book A Thousand-Mile Walk to the Gulf.

-- By Raul, Forest Explorer