In 1966, U.S. Senator Robert Kennedy made an influential visit to South Africa. There he offered words of hope to opponents of apartheid in his famous “Ripple of Hope” speech at the University of Cape Town. In his speech, he declared, “Each time a man stands up for an ideal, or acts to improve the lot of others, or strikes out against injustice, he sends forth a tiny ripple of hope, and crossing each other from a million different centers of energy and daring, those ripples build a current which can sweep down the mightiest walls of oppression and resistance.”

At…