On September 21, 1860, Arthur Schopenhauer, German philosopher died (b. 1788). From the article:
"Though his work failed to garner substantial attention during his life, Schopenhauer has had a posthumous impact across various disciplines, including philosophy, literature, and science. His writing on aesthetics, morality, and psychology influenced thinkers and artists throughout the 19th and 20th centuries. Those who cited his influence include Friedrich Nietzsche,[24] Richard Wagner, Leo Tolstoy, Ludwig Wittgenstein,[25] Erwin Schrödinger, Otto Rank, Gustav Mahler, Joseph Campbell, Albert Einstein,[26] Carl Jung, Thomas Mann, Émile Zola, George Bernard Shaw,[27] Jorge Luis Borges and Samuel Beckett."