J.R.R. Tolkien's literary career was influenced by his experiences as a soldier in World War I, which informed the themes of loss and heroism in his works. Growing up surrounded by the rich folklore of England and his love for languages also played a vital role in shaping his creative imagination. These factors, combined with his academic background in literature, led to the creation of complex languages and immersive worlds in *The Hobbit* and *The Lord of the Rings*, establishing him as a pioneering figure in fantasy literature.