Unsung hero?

Never heard of him growing up. Didn't give my full attention to the documentary on Olmsted because it was on public TV when I was trying to work on something else, but it kept distracting me. Really, tears came to my eyes. The guy created parks and wanted people to have psychological relief from enjoying them. He suffered from debilitating depression and dementia, and spent his last years at an asylum where he had designed the grounds. He also published Thoreau and Melville in Putnam's Magazine.