His joint work with Ely S. Parker among the Tonawanda Seneca led to The League of the Iroquois, and in his most famous work, he posited savagery, barbarism, and civilization as three stages of societal evolution.  
Franz Boas used the example of the Kwakiutl to argue that this man's theory of matrilineal to patrilineal movement was flawed.  In a work that included the sections "Growth of Intelligence" and "Growth of Idea and Government," he added four more levels to an idea of Montesquieu's, and he also wrote The American Beaver and His Works.  His joint work with Ely S. Parker among the Tonawanda Seneca led to The League of the Iroquois, and in his most famous work, he posited savagery, barbarism, and civilization as three stages of societal evolution.  FTP, name this anthropologist and author of Systems of Consanguinity and Affinity and Ancient Society.
Franz Boas used the example of the Kwakiutl to argue that this man's theory of matrilineal to patrilineal movement was flawed.  
Lewis Henry {Morgan}