His alternatives were few. Thirty-seven years after he took over as a revolutionary leader, liberating his nation from minority white rule, Zimbabwean President Robert Mugabe, 93, has resigned. Greeted with legislators’ applause and dancing in the capital’s streets, the move came after the southern African nation’s parliament started impeachment proceedings. Those followed last Wednesday’s military takeover in response to Mugabe’s wife, Grace, attempting to become her husband’s successor by ousting Vice President Emmerson Mnangagwa. Reports indicate Mnangagwa, Mugabe’s 75-year-old revolutionary comrade, could become Zimbabwe’s new leader within 48 hours.