Step 1: Understanding the Concept:
The question asks to identify the sociologist who introduced the concept of 'folkways' as a type of social norm.
Step 2: Detailed Explanation:
The American sociologist William Graham Sumner introduced the concepts of folkways and mores in his influential 1906 book, "Folkways: A Study of the Sociological Importance of Usages, Manners, Customs, Mores, and Morals".
- He defined folkways as the traditional behaviors or ways of life of a group of people that arise unconsciously and are not based on any moral judgment. They are the norms for routine and casual interaction.
Step 3: Final Answer:
William Graham Sumner has given the concept of folkways.