People
Africa is now widely recognized as the birthplace of the Hominidae, the taxonomic family to which modern humans belong. Archaeological evidence indicates that the continent has been inhabited by humans and their forebears for some 4,000,000 years or more. Anatomically modern humans are believed to have appeared about 100,000 years ago in the eastern region of sub-Saharan Africa. Somewhat later these early humans spread into northern Africa and the Middle East and, ultimately, to the rest of the world.
Africa is the most tropical of all the continents; some four-fifths of its territory rests between the Tropics of Cancer and Capricorn. As a consequence, the cultures and the physical variations of the peoples reflect adaptation to both hot, dry climates and hot, wet climates. Dark skin is the dominant characteristic of indigenous African peoples, but skin colour is not uniform. Skin colour shows a clinal variation from a light or tan colour in the northern fringe of the continent, which has a Mediterranean climate, to very dark skin in certain Sudanic regions in western and East Africa, where radiation from the Sun has been most intense. Africa has the most physically varied populations in the world, from the tallest peoples to the shortest; body form and facial and other morphological features also vary widely. It is the continent with the greatest human genetic variation, reflecting its evolutionary role as the source of all human DNA.
Throughout human history there have been movements of peoples (see human migration) within, into, and out of Africa along its northern coasts, across the Sinai Peninsula, along the Red Sea, and especially in the Horn of Africa and coastal areas as far south as Southern Africa. North Africa from the Strait of Gibraltar to the Nile River delta has been the site of conquests and movements of peoples for more than 3,000 years. Along the east coast, trading cities arose and fell, cities that had overseas contacts during the past two millennia with peoples of southern Arabia and as far east as India and Indonesia. Internal movements during this time contributed to the heterogeneity and complexity of native African societies. The greatest movement of peoples out of the continent was a result of the Atlantic slave trade that lasted from the 16th to the 19th century and saw an estimated 10,000,000 people transported into the New World. Such a loss of people, together with the devastating warfare and raiding associated with it, was the major cause of the subsequent weakness and decline of African societies.
Whereas the majority of Africa’s peoples are indigenous, European colonial settlers constitute the largest majority of new peoples, with substantial numbers in Kenya, South Africa, Zimbabwe, Zambia, Namibia, and Mozambique. Dutch settlers first arrived in South Africa in 1652; their descendants now constitute the main Afrikaner, or Boer, population. The vast majority of European settlers arrived after the 1885 Berlin West Africa Conference and the resulting “scramble for Africa,” during which European leaders carved out spheres of influence. Attendant, but unassociated, with the scramble, French and Italian settlers also established new communities in North Africa and, to some extent, western Africa. Much earlier, in several waves of migrations beginning in the 7th century, Arabs spread across northern Africa and, to a lesser extent, into western Africa, bringing a new religion (Islam) and a new language (Arabic), along with some new cultural and political institutions. They also spread Islam southward along the east coast, largely through trading and kinship relationships. (More detail is given in the regional history articles North Africa, Central Africa, Southern Africa, Western Africa, and Eastern Africa.) The colonial era began to disintegrate in the 1950s.