When medieval mystic Marguerite Porete came under attack from the church for her book, The Mirror of Simple Souls, she did what would infuriate church leaders the most. She refused to acknowledge their authority.

As historians try to fill in the gaps and magnify stories from marginalized groups, how do we reconcile victories that came from stepping on other marginalized groups?

Artemisia Gentileschi was the most celebrated female painter of the 1600s. She channeled the traumas of her life, including sexual assault by her tutor and the harrowing trial that followed, into evocative works that put women front and center.

The AIDS Coalition to Unleash Power was founded in 1987 to press government and religious authorities to take HIV/AIDS seriously at a time when it was dismissed as "the Gay Plague."

There was plenty of prejudice against Native Americans in the 1860s, yet as the Civil War raged on, a group of Native American soldiers from Michigan mobilized to fight for the Union.

Sometimes, one woman can change the course of history. One such woman was Emma of Normandy.

Margaret of Beverly was an English pilgrim who took up the sword when she found herself caught up in Saladin's siege of Jerusalem.

"Unbought and unbossed," according to her campaign slogan, Shirley Chilsholm was a powerhouse in Congress and a groundbreaking politician.

After neighboring Egypt fell to Julius Caesar, Amanirenas of Kush led her army against the Romans, stopping Caesar in his tracks.

In the 1960s, Fannie Lou Hamer fought not for the right to vote, but for the ability to exercise that right.