The Prehistory of Kangleipak or the pre-literary history of Manipur is the period of human history between the first use of stone tools by early men and the time just preceding Ancient Kangleipak (Antique Manipur). Comparing with other regions of the world, the development process of the archaeological work in Manipur is of recent times. Archaeological research in Northeast India is severely scarce, mostly limited to surface explorations, and lacking in state-of-the-art methods. The pioneering work in archeology was initiated by O. Kumar Singh. Before his presence, there was little information on the existence of the stone culture of Manipur. O. Kumar Singh is of the view that "Pre-Historic people used to settle in the hills during the Paleolithic and Mesolithic (Hoabinhian) culture while Neolithic people lived in both hills and valley. They came down to the valley at least by about 2000 BC." On the basis of the characters of the tool industry, the prehistory of Manipur is broadly classified into three periods. Human settlement Few attempts have been made to establish the earliest human settlement in Northeast India, and it is generally thought to have been uninhabited by archaic humans prior to late Pleistocene due to unfavorable geographical conditions. This is however disputed and Northeast Corridors are proposed by some scholars to have played a defining role in early hominid migrations and peopling of India. Paleolithic period Paleolithic period is the most primitive stone culture era. The Paleolithic period varies from place to place. In Manipur's neighbouring country Burma (Myanmar), the lower Paleolithic culture started from 750000 to 275000 BP. The Homo erectus (early Anyathian culture) began to settle on the banks of the Ayeyawaddy river in Burma in 750000 BCE. However, in case of Manipur, Paleolithic period started from 20,000 to 10,000 BCE.\ Most scholars don't discuss a paleolithic age in Manipur (and Northeast). However, Manjil Hazarika, in his 2017 survey of prehistory of Northeast India, rejects that there exists any plausible ground to deny presence of Paleolithic culture in Manipur. A few paleolithic sites (Khangkhui, Napachik, Machi, Somgu and Singtom) have been located in Manipur. Though, in absence of good chrono-stratigraphic context of the founds and their cohabitation with remains of other ages, accuracy of such identifications remains open to critiques. The existence of Hoabinhian-like complexes remains disputed, as well. The stone culture of Paleolithic period were discovered from the five archeological sites, Songbu, Khangkhui, Machi,