Chiyome Mochizuki (16th century) The Widow Who Ran a Ninja Academy Recruited widows, orphans, and prostitutes into an all-woman ninja spy group, the largest in Asia at the time.
Emmy Noether (1882-1935) The Most Important Mathematician You've Never Heard Of Revolutionized the field of mathematics, yet was persecuted for being Jewish and paid a pittance for her visionary teaching work.