Do you mean:
* William J. Chaput? He is a professor of sociology at the University of Massachusetts Amherst, specializing in social movements, collective action, and social change. He has written several books and articles on these topics.
* A different author? If you can provide more information, such as the genre or title of their work, I might be able to help you find the author's information.
Please clarify your request so I can assist you accurately.