Over the last couple of centuries, there has been a profound shift in the things which Africans have around them, or in other words their material culture. At differing speeds and to different extents, depending on the part of the continent and the political and religious positioning of the people concerned, the goods of the globalized world have penetrated to the farthest reaches of Africa. Belongings, and thus identities, have taken on new forms. This, however, is not a completely new phenomenon, as Africans have been absorbing things from outsiders to the continent for as long as there have been humans outside Africa. Understanding these shifts, and analyzing the causes and consequences thereof, requires the study of a wide variety of types of sources, many of which are dealt with by historians of Africa with a rare degree of sophistication, so that the fascinating stories of material change can be fully examined.
Rock art is an archaeological resource with the potential to reconstruct aspects of the ideologies of prehistoric societies. Research methods are distinguished here from theoretical, interpretive frameworks. The methods discussed here concern the documentation of rock art, methods of working with the temporal dimensions of rock art (such as developing relative chronologies and dating), and the characterization of pigments. Nonetheless, the choice of research methods depends on an explicitly formulated, theoretically informed research question. Research aims will also determine the scope and scale of the documentation and chronological methods employed. Fieldwork is a major and initial component of documentation and may involve surveying for rock-art sites. Researchers should experience rock art first hand. Digital mapping and imaging techniques are used routinely, but field tracings continue to be an important means of recording and interpreting the art. Computational photography includes enhancement software such as DStretch and other techniques that enable researchers to see details that would otherwise be invisible. Temporality is a fundamental attribute of rock art, and the biggest challenge in this regard is to relate the chronological sequences on the rock face to other archaeological and environmental data and thus contextualize the rock art. Relative chronologies provide information about the order of image-making episodes at a site or in a particular region. Age determinations may be arrived at using correlative methods in which the art is dated by means of independently available age ranges. Accelerator Mass Spectrometry (AMS) radiocarbon dating is commonly used to date organic paint samples. Engravings are difficult to date; age ranges obtained from cation-ratio (CR) and varnish microlamination (VML) are regarded as approximations. Pigment analysis is used to characterize the inorganic components of paint and to detect the presence of organic components. Research methods are multidisciplinary and thus require a coordinated, unified approach in order to achieve the research aims.
Writing Africa’s history before the 10th century almost always means relying on sources other than written documents, which increase in number especially from the 16th century onward. Archaeology (including the study of art objects), the comparative study of historically related languages, paleo-environmental studies, and oral traditions provide the bulk of information. Writing Africa’s early history ideally involves collaboration among experts in using each kind of source, an increasingly common practice. Despite the challenges of analysis and interpretation posed by this base of sources, early African history has a depth and breadth akin to the histories made from the written sources in archives. Even so, whereas written documents provide details about individuals and precise dates, the sources for writing early African histories more often provide detail about conceptualization, for example, of time, hospitality, and individualism and about larger, environmental contexts shaping those concepts and shaped by the actions of the people who held them. Translating such concepts and scales of action into accounts accessible to those—including many historians—not steeped in the methodological conventions underlying the analysis of each source is a major challenge facing historians of Africa’s earlier past.