In the 20th century, women played key roles in politics, science, art, and social life, leaving an indelible mark on history. They changed the rules, broke barriers, and paved the way for future generations. Here are the 7 most influential women of the 20th century whose achievements changed the world. Marie Curie (1867 – 1934) Marie Curie was the first woman to receive the Nobel Prize and the only person to win it in two different scientific fields. Her discovery of radioactivity paved the way for the development of modern physics and medicine. Together with her husband Pierre Curie, Marie di…