The Social Lens: An Invitation to Social and Sociological Theory, Third Edition is an upper division undergraduate social theory textbook that introduces the student to the major classical and contemporary theorists. The theorists were chosen for the diversity of their perspectives as well as their ability to introduce the student to contemporary theory. Dr Allan uses a lively informative writing style to engage the students in the eras of social change that spawned the major sociological theories and then applies them to the current era, which also is experiencing major social change.