After a decade of triumphs for Africa's democrats - the ending of apartheid in South Africa, the ousting of Congolese tyrant Mobutu Sese Seko and free multiparty elections in Ghana, Kenya and Senegal - several regimes have reverted to violent repression and election-rigging to cling to power. National incomes may be rising but so is social inequality, fuelling political tensions.The fruits of higher growth are not resulting in social development.