The rise of early civilisation in the Peninsula, together with later Hindu-Buddhist kings and subsequent Islamic Malay sultanates system during the common era forever revolutionised the dynamics of Malay Peninsular society. With the easement of mobility and contact between various groups of people, the walls that separated the myriad of historical Austroasiatic and Austronesian tribal communities who once dwelled across the peninsula were dismantled, being gradually drawn and integrated into the Malay society, identity, language, culture and belief system. These Malayised tribes and communities would later be part of the ancestors of present-day Malay people. Other smaller, closely related tribes, often located further inland compared to their coastal cousins managed to be spared from the Malayisation process due to their secluded geographical location and nomadic and semi-nomadic lifestyle, hence preserving and developing their own endemic language, customs and pagan rituals.