👉 Illumism is a philosophical and literary movement that emerged in the 19th century, characterized by an emphasis on the importance of light and its role in shaping human experience. The term "illuminism" was coined by American author Henry David Thoreau in his book "Walden" (1854), which describes his experiences living in a log cabin near Walden Pond in Massachusetts. The movement is characterized by a focus on the natural world and its beauty, as