South Tapanuli is an area of North Sumatra inhabited by the Batak people. There are two types of Batak tribe, namely Toba Batak and Mandailing Batak. The Toba Batak are the Batak people who live on the coast of Lake Toba, while the Mandailing Batak are the Batak people who live further south of Lake Toba and are known as the Southern part of Tapanuli. The South Tapanuli Batak community has a diversity of cultures, religions and customs. Even though they are Batak people, the customs in each village still have differences. Likewise, religions include Islam, Protestant Christianity, Catholic Christianity, Hinduism and Buddhism. So far, this diversity has not led to significant conflict. In fact, they can live in harmony and tolerance and respect each other. In their community activities they collaborate and invite each other. Likewise, their kinship is bound by marriage. During Eid al-Fitr, Muslims visit their Christian families, as well as during Christmas and New Year, Christians usually visit their Muslim families. The harmonization of the multicultural Batak community in South Tapanuli is bound by the social order of society and the philosophy of the Batak community which is a value system. The social order of the community is called Dalihan Na Tolu and the philosophy of life is Hombar Adat Dohot Ibadat. Dalihan Natolu is a triple stove as a symbol of balance and harmony. Dalihan Natolu is mora, kahanggi, and anak boru. Mora is the party taking the wife, kahanggi is the husband and his male brothers and male cousins either from the mother's side or from the father's side, and anak boru are the husband's sisters and the husband's female cousins either from the father's side or from the mother's side. Batak Hombar Philosophy Adat Dohot Ibadat which means custom alongside worship (besides religious value worship, there is also custom as a social value system).