A generation before Rosa Parks, a young Alaska Native woman was arrested for sitting in the "whites only" section of a Nome, Alaska movie theater.

Scholars Carol K. Coburn and Martha Smith write that nuns were an important part of westward expansion—and in Colorado, nuns quickly learned how to use their gender to their advantage.

During Prohibition, American women “made, sold, and drank liquor in unprecedented fashion,” writes historian Mary Murphy.

It's been 55 years since the Nuclear Test Ban Treaty. The massive amounts of fallout in the decade previous to the Treaty taught us a lot about the interconnected planet we live on.

“Ghana tells us that the forces of the universe are on the side of justice… An old order of colonialism, of segregation, discrimination is passing away now.”

Initially, Indian slavery was considered different from African slavery in the early Anglo-American colonial world, but this split didn't last for long.

How the Memphis Sanitation Strike, with its iconic “I AM A MAN” signs, helped deepen Martin Luther King, Jr.'s radicalism in the last months of his life.

Spiritualism was one of the nineteenth-century's most successful religious innovations, a movement of individuals who yearned for a religion which united mysticism and science.

Black Muslims have been an influential force in the prisoners' rights movement and criminal justice reform as early as the World War II era.

The writings of Martin Luther King, not so well known as his speeches and acts of civil disobedience, are a rich source for those researching his life.