Evidence for modern human presence in the northern and central highlands of Indochina, that constitute the territories of the modern Laotian nation-state dates back to the Lower Paleolithic. These earliest human migrants are Australo-Melanesians — associated with the Hoabinhian culture and have populated the highlands and the interior, less accessible regions of Laos and all of South-east Asia to this day. The subsequent Austroasiatic and Austronesian marine migration waves affected landlocked Laos only marginally and direct Chinese and Indian cultural contact had a greater impact on the country.