In our world of diversity, it has often been easier to focus on the differences that divide us rather than the principles that unite us. Ours is the story of a species defined by religion, the color of our skin, the wealth of our societies, and the advancement of our technology. Within the 4.5 billion years that scientists estimate our world has been in existence, our nearest human ancestors emerged only about 250,000 years ago. During that relatively brief span of time, we’ve managed to seek out our differences and parlay them into the invisible boundaries of class and society that fuel our sense of separateness. Based upon those boundaries, countless members of our global family have suffered in ways that seem unthinkable, even unimaginable, to the minds of rational and loving people. Together, we share the darkness of a history punctuated by persecutions, inquisitions, enslavement, and attempts to eliminate entire races from the face of the earth.