Transcendentalism emerged in early 19th century America, emphasizing individualism, self-reliance, and the inherent goodness of humans and nature. This philosophical movement rejected rationalism, focusing on subjective experience and intuition to connect with a higher spiritual realm. Key figures like Emerson, Thoreau, and Fuller shaped Transcendentalism through influential works such as "Nature," "Walden," and "Woman in the Nineteenth Century." Their ideas on self-reliance, social reform, and the interconnectedness of all living things continue to resonate in modern society.