Environmentalist Quotes and aphorisms about men John Muir John Muir John Muir ,, It seems strange that bears, so fond of all sorts of flesh, running the risks of guns and fires and... John Muir John Muir ,, During my first years in the Sierra, I was ever calling on everybody within reach to admire them, b... Aldo Leopold William Bartram Joseph Wood Krutch Garrett Hardin Richard Leakey