Which author is best known for writing "To Kill a Mockingbird"?

Harper Lee is best known for writing "To Kill a Mockingbird," which was published in 1960 and has since become a classic of American literature. The novel addresses complex themes such as racial injustice, moral growth, and empathy through the perspective of a young girl named Scout Finch in the racially charged environment of the American South during the 1930s. Lee's insightful narrative and rich characterizations have left a lasting impact on readers and have made the book a staple in educational curricula.

Other authors listed, while significant in their own areas, are not associated with this particular work. W.E.B. Du Bois was a prominent civil rights activist and scholar known for his contributions to sociological thought and literature on race relations. Aristotle was an ancient Greek philosopher whose works cover a wide range of topics from ethics to metaphysics, and Pearl S. Buck is renowned for her novels about China, especially "The Good Earth," which earned her the Nobel Prize in Literature. While these authors have made important contributions to literature and social thought, it is Harper Lee who is identified with "To Kill a Mockingbird."