Olga Plümacher

Olga Marie Pauline Plümacher (née Hünerwadel; 27 May 1839 – c. 15 June 1895), who wrote under the name O. Plümacher, was a Russian-born Swiss-American philosopher. She engaged with the philosophies of the German philosophers Arthur Schopenhauer and Eduard von Hartmann, and published three books which contributed to the pessimism controversy in Germany. Her book on the history of philosophical pessimism, Der Pessimismus in Vergangenheit und Gegenwart ("Pessimism in the Past and Present"), was influential on Friedrich Nietzsche and Samuel Beckett.