👉 Walden's, or Waldenism, is a spiritual and philosophical movement that emerged in the 19th century in America. It was founded by Henry David Thoreau, an American writer, philosopher, and environmentalist, who lived from 1817 to 1862. The term "waldenian" refers to someone or something associated with Walden, a spiritual retreat located near Concord, Massachusetts, established in the late 19th century by