The founders of sociology in the United States wanted to make a difference. A central aim of the sociologists of the Chicago school was to use sociological knowledge to achieve social reform. A related aim of sociologists like Jane Addams, W.E.B. DuBois, and Ida B. Wells-Barnett and others since was to use sociological knowledge to understand and alleviate gender, racial, and class inequality.
It is no accident that many sociology instructors and students are first drawn to sociology because they want to learn a body of knowledge that could help them make a difference in the world at large. Steve Barkan's Sociology: Understanding and Changing the Social World is designed for this audience. It presents a sociological understanding of society but also a sociological perspective on how to change society, while maintaining the structure and contents of the best mainstream texts.