The border zone from West Turkestan to India was basically incorporated into the western periphery of eastern Eurasia in [Phase I] of this paper, although it was a bi-partite zone overlapping eastern and western Eurasia. In [Period II], this border zone was incorporated into the Islamic frontier and converted to the eastern periphery of western Eurasia.
In [Period I], it was the borderlands that strongly promoted the globalization of eastern Eurasia. This zone was the source of the spread and establishment of Buddhism over a wide area in eastern Eurasia, and it also allowed Sogdian merchants to establish a trade network. From [Period II] onward, the border region became the frontier of Islam in western Eurasia, and this led to eastern Eurasia becoming closely linked to the trade network of western Eurasia via the border region.
While it is possible to examine the “globalization” of pre-modern eastern Eurasia from a variety of perspectives, this paper focuses on the historical role of the borderlands and attempts to trace the process of globalization over a long time span, from around AD to the Mongol Empire period.