Today, we commemorate the life and legacy of Dr. Martin Luther King, Jr., and remember his belief in the “great chain of humanity,” connecting neighborhoods and communities across the globe. #OnThisDay, the 40th anniversary of the King national holiday, we honor his message of global altruism, marked by redemptive compassion and transformative service among all. The power of Dr. King’s vision of a “brotherhood of humanity” inspired the fifteen-year struggle to establish his birthday as a nationa