If you consider social development to be a country's ability to provide social services for it's own population, very little social development has taken place in the past ten years. African nations have received some help from the United Nations and many charitable organizations but have made little headway in providing social services for themselves.
Social development is joined at the hip with economic and political development. Social programs cost money and since they mostly benefit the members of society with the least amount of influence, they tend to be the first to suffer in times of economic crisis. The past ten years in Africa were no exception.