Ralph Waldo Emerson is widely regarded as one of the most influential figures in American literary history. He was a philosopher, essayist, and poet who lived during the 19th century. His most famous quote is "Self-reliance is the foundation of a prosperous society." This quote is often cited as a cornerstone of Emerson's philosophy, which emphasized individualism, self-sufficiency, and the importance of following one's own path in life. This message continues to inspire and resonate with people around the world, making it one of the most enduring and memorable quotes in American literary history.