Abstract
This study aims to explore the socio-cultural aspects, policies, and the mentality that influence social integration in the western Sumatran society. Location of this study spread over counties and cities in West Sumatra, represented by the six District/City, namely: Pasaman Barat, Solok, Pesisir Selatan, Sawahlunto, Dharmasraya, and Bukittinggi. Selection of sample areas is based on the degree of heterogeneity of society. The study was designed in the form of a survey with a qualitative approach. Data collected through interviews and documentation studies. Data were analyzed in stages through data collection (recording), categorizing the data, coding the data by category, and data interpretation. The results obtained from this research is presented in a description of the socio-cultural community which is reflected in the socio-cultural "malakok" as a means of integration of migrant communities with indigenous communities. “Malakok” existence becomes more obvious with the current government policy called "Back to the Nagari". This policy is an attempt to revive the traditional leadership role in the governance system of the Minangkabau society. Lastly, in addition to social integration, malakok strength in Minangkabau society is influenced by the mentality of the local communities such as tribal solidarity, tolerance, loyalty, and openness.
Key Word : the socio-cultural aspects, policies, the mentality, malakok