Answer:
This way of understanding cultural differences came to be known as historical particularism.
Explanation:
Franz Boas is considered the father of anthropology in the United States. He and his students developed historical particularism, which rejects the cultural evolutionary model. That means that, instead of believing all cultures follow the same evolutionary path, Boas believed each culture is specific to its own environment and context. Cultures are developed according to the historical process they undergo, which makes each one of them unique.