For Henri David Thoreau (1817-1862), a naturalistic writer and first environmentalist, nature was part of his belief. For this purpose, Thoreau built a club on the shore of Walden Lake in the spring of 1845. He observed nature here, farmed his observations and thought for a day.
While continuing his life in the natural world, he consciously took a clear wisdom of his contemplation of human existence, society, state, and other subjects, along with sections of everyday life that wanted to learn only the basic necessities of life and to learn the necessity of life. (Thoreau lived a secluded life, had visitors for a day, and walked to the nearby town)
Thoreau's remarkable ability is to develop an ordinary everyday affair or thought that begins by observing a detail in the nature, so that he can take a deep view of the most basic problems of mankind.
Thoreau, known for influencing great personalities like Tolstoy and Gandhi, has been regarded as a masterpiece in philosophical thought all over the world.