Arthur Schopenhauer — what did Arthur Schopenhauer do at each age?

アルトゥル・ショーペンハウアー | Historical Figure | Born 1788

German philosopher known for pessimism

Timeline

Age 25 (1813): Completed doctoral thesis "On the Fourfold Root of the Principle of Sufficient Reason"
Age 30 (1818): Published "The World as Will and Representation"