The war in Yemen is contributing to what the U.N. says could become "the worst famine in the world in 100 years." 22 million people are in need of aid.

This week the war in Yemen enters its fourth year. What makes this conflict so heartbreaking is its cruelty, the warring factions deliberately targeting civilians and civilian infrastructure. Some 22 million people, are in need of immediate humanitarian assistance.

In the 1600s, a group of writers collaborated on a historical play called Sir Thomas More. The script included one of the earliest and most impassioned defenses of a compassionate refugee policy, an extract known as The Strangers’ Case, widely believed to be written by William Shakespeare.