With the extraordinary growth of the academic discipline of history in the 19th century, the history of the Middle Ages was absorbed into academic curricula of history in Europe and the United States and established in university survey courses and research seminars. Journals of scholarly historical research began publication in Germany (1859), France (1876), England (1886), and the United States (1895), regularly including studies of one aspect or another of the Middle Ages. Historical documents were edited and substantial scholarly literature was produced that brought the history of the Middle Ages into synchronization with other fields of history. The study of the Middle Ages developed chiefly as a part of the national histories of the individual European countries, but it was studied in the United States as a pan-European phenomenon, with a focus after World War I chiefly on English and French history. The growing influence and prestige of the new academic and professional field of medieval history were reflected in the Monumenta Germaniae Historica (“Historical Monuments of the Germans”), a research and publication institute founded in 1819 and still in operation in Munich, and in the eight-volume collaborative Cambridge Medieval History (1911–36). (The latter’s replacement, The New Cambridge Medieval History, began to appear in 1998.)

Most scholars of the 19th and early 20th centuries accepted the view that history is largely a story of progress, in which occasional periods of decline—such as the Middle Ages—are succeeded by periods of renewal. The most articulate attack on this view was by the American medievalist Charles Homer Haskins in The Renaissance of the Twelfth Century (1927), which applied Michelet’s and Burckhardt’s term Renaissance to the 12th century rather than to the 15th or 16th.

Although the teaching responsibilities of academic historians of the Middle Ages still generally reflect either the original tripartite division of European history or the more recent and more common quadripartite division (ancient, medieval, early modern, and modern), most scholars specialize in only very small parts of a very long period. With the emergence of late antiquity as a distinct field of research and teaching since the mid-20th century, the early part of the conventional Middle Ages has been rethought and rewritten. The distinctive post-Classical period of late antiquity is now considered the medium through which ancient Greco-Roman traditions were passed on to later Europeans. The older image of a Classical antiquity despised by world-rejecting Christians and wiped out by savage barbarians is no longer credible.

Historians in the late 20th and early 21st centuries also debated the existence of a rapid and extensive change in European society at about the turn of the 2nd millennium. Some scholars, following the pioneering lead of the French historian Georges Duby, argued for a rapid mutation, chiefly with regard to the development of new kinds of lay and ecclesiastical power over agricultural labour and the simultaneous restructuring of aristocratic lineages in the 11th century. Others maintained that a gradual transformation of society and culture occurred over a longer period of time, beginning earlier than the 11th century. These debates influenced the concept of a long Middle Ages mentioned above.

With the emergence of the concept of early modern history, roughly from 1400 to 1800, the Middle Ages, the Renaissance, the Reformation, and the scientific revolution were subsumed into a period extending from the late 14th century to the 18th century. The creation of specialized scholarly conferences, historical journals, monograph series, and thematic collections of scholarly essays has reflected these changes in the configuration of the period.

Scholars also rethought the nature of change in different parts of Europe. They recognized the problem of the obvious differences between those European lands in late antiquity that had once been part of the Roman Empire and those that had not and therefore got their Romanism and antiquity secondhand. They also revised their understanding of the relations between the older Mediterranean world (large areas of which entered the Byzantine and Arab-Islamic cultural orbits) and northern Europe. In addition, scholars examined how Roman culture exported itself to peripheries on the north and east through a form of colonization that culminated in the absorption of originally peripheral colonies into an expanded core culture.

Middle Ages remains both a commonplace colloquial term and the name of a subject of academic study. But the history of the term and the current debate about its temporal and spatial application and appropriateness is a reminder that historical periods are cultural and social constructs based on later perceptions of the past, that human life often changes quite rapidly within labeled periods, however designated, and that the dialogue between continuity and change is the historian’s primary intellectual activity.