Baroness Bertha von Suttner
Baroness Bertha von Suttner, the first woman to be awarded the Peace Prize, wrote one of the nineteenth century's most influential books, the anti-war novel "Lay Down Your Arms" (1889). The title was provocative to many, but the anti-militaristic message caught on. In the 1870s she became a close friend of Alfred Nobel's, and they corresponded for years on the subject of peace. The Peace Prize Laureate became one of the leaders of the international peace movement, and in 1891 established the Austrian Peace Society. At the male-dominated peace congresses she stood out as a liberal and forceful leader. At the beginning of the new century she was referred to as the "generalissimo of the peace movement".
Credit: https://www.nobelprize.org/nobel_prizes/peace/laureates/1905/suttner-facts.html