So tender was Emperor Ai’s love for his "male companion" that, when he had to get up, instead of waking his lover, he cut off the sleeve of his robe.

Spirituality has long infused and inspired social justice movements. Activists today expand that heritage.

After a massive factory fire in 1911, hundreds of thousands of people took to the streets to stage a "symbolic funeral."

Well-researched stories from NBC, the Marshall Project, and other great publications that bridge the gap between news and scholarship.

The development of chemical warfare around the time of World War I led to the use of tear gas as a weapon by civilian police forces.

One scholar explains how the LGBT movement became focused on advancing the rights of a narrow set of people at the expense of its once-radical vision.

Diversity among officers lags behind the general population. But is police culture a greater problem when it comes to combating excessive force?

Audre Lorde's influence on contemporary intersectional feminism was profound, as pioneering Black literary scholar Barbara Christian wrote.

Idioms have a special power to draw people together in a way that plain speech doesn't.

Getting to know trees can lead to new ways of looking at the world.