Three exemplary Americans died in less than a year. Three Americans taught us the importance of commonality: Congressman Elijah Cummings; Congressman John Lewis; and Rev. Cordy Tindell “C.T.” Vivian. All three were stalwart civil rights leaders. All three advocated the message of Reverend Dr. Martin Luther King Jr.: “Injustice anywhere is a threat to justice everywhere.” All three, and thousands...