Nelson Mandela, who led the emancipation of South Africa from white minority rule and served as his country’s first black president, becoming an international emblem of dignity and forbearance, died Thursday night. He was 95. The South African president, Jacob Zuma, announced Mandela’s death. Mandela had long declared he wanted a quiet exit, but the time he spent in a Pretoria hospital in recent months was a clamor of quarreling family,...