As the inadequacies of culture-historical archaeology for understanding how prehistoric cultures operated and changed became obvious to a growing number of archaeologists, they adopted new approaches to the study of prehistory that were based on systematic anthropological and sociological investigations of human behavior. These approaches are generally designated as being functional and processual in nature. Culture-historical studies traditionally explained changes from the outside by attributing them to diffusion and migration. Functional and processual studies try to understand social and cultural systems from the inside by determining how different parts of these systems are interrelated and how these parts interact with one another. Functionalism is a synchronous approach that attempts to understand how systems operate routinely without accounting for major changes. Processual approaches seek to understand how and why such systems change irreversibly. Yet, many self-styled functionalist anthropologists also were interested in how systems changed (Malinowski 1945; Evans-Pritchard 1949, 1962). Although functionalist approaches are often presumed to have preceded processual ones in anthropology, both have been employed at least incipiently in prehistoric archaeology since the mid-nineteenth century and they were often used together.

In Europe and North America, culture-historical and functional-processual archaeology might have continued to develop alongside one another in a complementary fashion as they had done in the 1950s. Instead, in the early 1960s, a group of American processual archaeologists launched an all-out attack on culture-historical archaeology, which they proposed to replace with an approach that was evolutionist, behaviorist, ecological, and positivist in orientation. In the late 1980s, archaeologists, mainly in Britain, offered an equally dogmatic, culturally oriented postprocessual archaeology as a solution for what they proclaimed were processual archaeology's shortcomings. Neither option has lived up to its promise to solve all of archaeology's problems, although together they offer productive ways to consider many, but not all, of the questions archaeologists must address. In retrospect, these two antagonistic positions can be seen to reflect successive theoretical fashions in anthropology.

Neoevolutionism

The two decades following World War II were an era of unrivaled prosperity and unchallenged political power for the United States. Despite the threat of nuclear war, this also was a time of great optimism and self-confidence for middle-class Americans.

The culture-historical archaeology of the late nineteenth century was a response to growing awareness of geographical variability in the archaeological record at a time when cultural evolutionism was being challenged in western and central Europe by declining faith in the benefits of technological progress. These developments were accompanied by growing nationalism and racism, which made ethnicity appear to be the most important factor shaping human history. Nationalist fervor increased as spreading industrialization heightened competition for markets and resources. Toward the end of the century, it was encouraged by intellectuals who sought to promote solidarity within their own countries in the face of growing social unrest by blaming economic and social problems on neighboring states.

Early Interests in Ethnicity

National consciousness has a long history. Already in the sixteenth and seventeenth centuries it had played a significant role in the development of antiquarianism in northern and western Europe.

Since the 1950s archaeology, especially in North America and western Europe, has shifted from a seemingly complacent culture-historical orthodoxy to ambitious theoretical innovations. These innovations have led to growing disagreements about the goals of the discipline and how these goals can be achieved. Increasing numbers of archaeologists, following in the wake of historians and sociologists, have abandoned positivist certainty and begun to entertain doubts about the objectivity of their research. They see social factors as determining not only the questions they ask but also the answers they judge to be convincing. Extreme versions of this view deny that archaeologists can offer interpretations of their data that are other than a reflection of the transient values of the societies in which they live. Yet, if archaeology cannot produce some kind of cumulative understanding of the past and a commentary that is at least partially independent of specific historical contexts, what scientific – as opposed to political, psychological, or aesthetic – justification can be offered for doing archaeological research?

These concerns have encouraged studying the history of archaeological thought as a means by which problems of subjectivity, objectivity, and the gradual accumulation of knowledge can be assessed.

The development of a self-contained, systematic study of prehistory, as distinguished from the antiquarianism of earlier times, occurred as two distinct movements, the first of which began in the early nineteenth century and the second in the 1850s. The first originated in Scandinavia with the invention of a technique for distinguishing and dating archaeological finds that made possible the comprehensive study of prehistory. This development marked the beginning of prehistoric archaeology, which soon was able to take its place alongside classical and other text-based archaeologies as a significant component in the study of human development using material culture. The second wave, which began in France and England, pioneered the study of the Palaeolithic period and added vast, hitherto unimagined, time depth to human history. Palaeolithic archaeology addressed questions of human origins that became of major concern to the entire scientific community and to the general public as a result of the debates between evolutionists and creationists that followed the publication of Charles Darwin's On the Origin of Species in 1859.

Relative Dating

The creation of a controlled chronology that did not rely on written records was the work of the Danish scholar Christian Jürgensen Thomsen (1788–1865).

The first archaeologists were only interested in historical times. They sought to use major works of art and architecture from the past to extend their knowledge of ancient civilizations that were already familiar to them from written records. Although they progressively enhanced their ability to elicit information about human behavior from material remains, they did not at first seek to study peoples about whom there was no written documentation. In the German academic tradition, the term archaeology (Archäologie) remains generally restricted to this sort of archaeology, whereas prehistoric archaeology is called Urgeschichte (history of beginnings) or Frühgeschichte (early history). Elsewhere the term archaeology was extended to the study of prehistory as the latter activity became more professionalized (Gran-Aymerich 1998: 128–30). Both classical and prehistoric archaeology grew out of a less professional and at first largely undifferentiated antiquarianism.

As a result of the work of prehistoric archaeologists, today we know that historical archaeologists ignored at least 95 percent of human history extending from the earliest known hominids who existed some four million years ago to the nonliterate peoples who lived in many parts of the world until recent times. In this chapter, we will examine how archaeology began to develop in northern and central Europe, where historical records usually do not antedate the Roman period and in some areas began only after ad 1000.

A shared commitment to an evolutionary approach promoted a close alignment between prehistoric archaeology and ethnology in western Europe and the United States beginning in the 1860s. In Europe, the foundation for this alignment was the belief in unilinear cultural evolution forged a century earlier by Enlightenment philosophers. It was accepted that arranging modern cultures in a series from simplest to most complex illustrated the earlier stages through which the most advanced cultures had developed in prehistoric times. French and British Palaeolithic archaeologists did not try harder to elucidate the past using archaeological data because their commitment to unilinear evolutionism led them to believe that ethnology revealed almost everything they wished to know about prehistoric times.

In the United States, where it was assumed that relatively little cultural evolution had occurred in prehistoric times, archaeology, ethnology, physical anthropology, and linguistics had begun by the 1840s to be regarded as different branches of anthropology, which was identified as the study of American indigenous peoples.

Since the first edition of A History of Archaeological Thought was published in 1989, there has been a significant upsurge of interest in the history of archaeology and a vast increase in the publication of books and papers relating to this topic. As recently as the 1970s, one or two significant books and a handful of papers dealing with the history of archaeology were published each year. At the height of their influence in the 1970s, processual archaeologists proclaimed that the history of archaeology was irrelevant for understanding the development of the discipline, which they argued was shaped by the deployment of ever more rigorous forms of scientific method. This view reduced the history of archaeology to being little more than a form of entertainment or propaganda. Today, a growing number of archaeologists, who accept that what archaeologists believe influences not only the questions they ask but also the answers they find acceptable, maintain that all archaeological interpretations must be evaluated in relation to their historical context. This growing interest has transformed the history of archaeology into being an established subdiscipline of archaeology with its own international bulletin, symposia, encyclopedias, textbooks, and publication series. An increasing number of studies, often based on painstaking archival research and oral histories, are examining the archaeology practiced at specific times and in specific places from a variety of analytical perspectives. These works have made a new edition of A History of Archaeological Thought essential.