Final answer:
Alfred Kroeber disagreed with the idea of unilineal cultural evolution and believed that cultures change according to their own unique historical trajectory. He emphasized the importance of cultural diffusion and interaction among cultures.
Step-by-step explanation:
Alfred Kroeber, like many anthropologists, disagreed with the idea of unilineal cultural evolution proposed by early anthropologists such as Edward Tylor and Lewis Henry Morgan. Kroeber believed that each culture changes according to its own unique historical trajectory and that cultures evolve not in isolation but in constant interaction with each other. He emphasized the diffusion of material objects, practices, and ideas among cultures in complex relations of trade, migration, and conquest.