Southeast Asia is a cultural region characterized by "unity in diversity". In terms of geo-ecology, Southeast Asia has a very unique ecology of a region with a humid monsoon tropical climate, which creates a characteristic element of the "wet rice agricultural culture / civilization", along with that very characteristic agricultural religious factors. This is a universal factor for the whole region and the foundation creating the character "unification" in Southeast Asian culture. However, Southeast Asia is also a region with many natural landscapes creating a diversity of geography - ecology, at the same time this area is also very diverse in terms of culture, especially the diversity of religious and ethnic factors. It is this diversity factor that, on the one hand, creates the rich diversity in Southeast Asian culture, especially in terms of religion and ethnicity; however, these factors also create certain obstacles to the integration and development of the region.