Michael Paul Johnson (born 20 December 1942) is Emeritus Professor of Sociology, Women’s Studies, and African and African American Studies at Penn State. He is an internationally recognized expert on domestic violence.
Susan M. Hartmann is an author in the field of American history. She is best known for her work on American Promise 6e V2 and LaunchPad for The American Promise and Value Edition 6e, essential resources for students of the subject.