Early Indianized Kingdom of Funan, Government, Politics, Economy, People of Cambodia. Archaeological evidence indicates that parts of the region now called Cambodia were inhabited during the first and second millennia B.C. by peoples having a Neolithic culture. Cambodia History and Culture Information and Travel Guide. Vacation package Book. By the first century A.D., the inhabitants had developed relatively stable, organized societies, which had far surpassed the primitive stage in culture and technical skills. The most advanced groups lived along the coast and in the lower Mekong River valley and delta regions, where they cultivated irrigated rice and kept domesticated animals. Learn more on Cambodia history.