After the Civil War (1861–65; a war between the proslavery Southern states and the antislavery Northern states), Emerson continued to lecture and write. Though he had nothing really new to say anymore, audiences continued to crowd his lectures and many readers bought his books. The best of the final books were Society and Solitude (1870) and Letters and Social Aims (1876). He was losing his memory, however, and needed more and more help from others, especially his daughter Ellen. He was nearly seventy-nine when he died on April 27, 1882.