As we know, polygenism is a theory that believes that human origins came from different lineages. Co-Adamism is one of the branches of polygenism. Co-Adamism is a theory that God created other humans besides Adam and Eve at the same time. Co-Adamism or often called Double Adamism is a theory developed by Henry Home, Lord Kames of Scotland. He began with languages ​​and human origins and then theorized that the new world emerged from the bottom of the sea. Kames's view came after examining the differences between men, and he came to the conclusion that these differences were so great that men might not all be in the same race with others. He saw all the differences in their faces, hair, skin, shapes and basic moral qualities. Then he thought that God must have created many types of human races called multiple Adamism referring to both external and internal differences that each human being has. So, we can say that Co-Adamism is a theory that there were other humans with different races besides Adam. and Eve as the first people on earth. He believes that other races exist referring to the main differences that every human being has. Co-Adamism also serves as a plausible view for the Christian. Kames himself made an effort to bring his theory into accord with the teachings of the Bible. Another scholar who believed in Co-Adamism is Giordano Bruno (1548 – 1600). He is a co-Adamist who believed that an infinite number of Gardens of Eden existed during the time of Adam. In 1591 Giordano Bruno stated that since it is impossible to imagine that Jews and Ethiopians came from the same lineage, God certainly created different Adams. Charles White was another believer in co-Adamism, but he used science to support his views. White's Account of the Regular Gr...... middle of the paper ......irm that skull could be one of the tests to differentiate the human races, he differentiated the size of the skull then he also divided the size of the brain. Like Cuvier, Morton is also a supporter of the theory of polygenesis. According to Morton's theory, he assigned the Europeans as the owners of the highest brain capacity, then the Chinese, the South-East Asians, the American Indians, while the smallest capacity belongs to the Africans and the Australian aborigines. Thirdly, the factor that has been taken into consideration is the human quality in their civilization. . From these three things (skin, skull and quality of relationship) Cuvier concluded that human origin could be classified as this next stage, the pinnacle being the white race according to appearance and brain capacity. In the middle was the yellow race, and at the bottom the black race. This is why polygenesis could be one of the reasons why racism has existed in human life.