The prehistoric eraāfrom the first signs of human habitation to the emergence of written recordsāin the region that would become modern Estonia lasted nearly nine millennia. Little is known about this long period; however, a growing number of archaeological finds and evidence from other disciplines provide the basis for cautious generalizations. Before turning to such issues as the origins of the Estonians and the arrival of their ancestors in the Baltic, it will be useful to make some brief geographical comments.
The area populated by the Estonian people and their ancestors has not changed appreciably in the last 1500 years. Twentieth-century Estonia is approximately the size of the states of Vermont and New Hampshire combined. In comparison to other European states, it is larger than Denmark, Switzerland, the Netherlands, or Belgium. To the west and north, Estonia borders on the Baltic Sea and the Gulf of Finland, affording an avenue of contact with Central Europe and Scandinavia. Other nationalities located on the Baltic, especially the Germans, Swedes, and Danes, have used this open waterway to penetrate Estonian territory. To the east, Lake Peipsi has formed a natural dividing line between Slavic and Finnic worlds for centuries. Only in the twentieth century has the Slavic element moved significantly farther west into traditionally Estonian areas. To the south, Estonia has a land border with the Latvians that gradually moved north until it stabilized in early modern times.
Geographically, Estonia is part of the great East European plain and can be divided into two major regions. Lower Estonia consists of the western and northern coastal regions, including the islands as well as the areas around Lakes Peipsi and Vorts (the two largest inland bodies of water). Upper Estonia includes the central and southern regions, excluding the lake districts, and is perhaps best pictured as the areas surrounding the urban centers of Rakvere (Wesenberg), Paide (Weissenstein), Viljandi (Fellin), Tartu (Dorpat), and Peru (Werro). Ninety percent of the country is less than 100 meters above sea level, although the higest point in Estonia at Suur Munamagi in the extreme southeast reaches nearly 318 meters. Whereas Lower Estonia is almost completely flat and often marshy, Upper Estonia is characterized by a more varied landscape and, as a result of glacial deposits, is by far the more agriculturally fertile of the two regions. Estonia possesses no great natural resources. The only mineral wealth of note is oil shale and phosphorite; abundant supplies of limestone and dolomite are available as building materials.