New South African Leader’s Challenge: Attack Apartheid’s Remnants

CAPE TOWN—The departure of South African President Jacob Zuma leaves his successor a year to convince voters the ruling African National Congress can shed the corruption scandals that have battered the party and change the sense among many poor and black people that—a quarter-century after the end of apartheid—it has failed on its promise to deliver racial equality.

Once Nelson Mandela’s heir apparent before becoming one of South Africa’s richest black men, Cyril Ramaphosa was sworn in as president on Thursday, following Mr....