Baltzell taught at a branch of
Pennsylvania State University. He joined the faculty of sociology at the
University of Pennsylvania in 1947. He said, "It was good to be born rich, because if you’re rich, you have freedom. But if you can’t be born rich, then the next best thing is to be a professor." In his most influential book,
The Protestant Establishment (1964), he asserted, "…While socialist faiths might aim for a classless society, the United States stressed equality of opportunity in an open class system." This book also introduced the term WASP in the book's tables. Baltzell explained, "How was I going to fit those words in the little boxes?″ It was easier to just fit 'WASP' in there." Although he preferred aristocratic leadership in society, his views were liberal. In the 1960s, Baltzell stated, "The existing elites must assimilate talented black leaders into a national aristocracy." He also believed that the Protestant aristocracy of the American upper class had damaged the country by failing to allow talented members of other groups, especially minorities and Jews, into their class. He also spoke well of women: "Throughout history, great men have tended both to have had mothers who were socially, morally, or intellectually superior to their husbands and also to have chosen as wives women who were well above them in one way or another.... Of all the thirty-nine presidents [as of 1980]…only Nixon, Ford, and Carter married beneath themselves."
Frank Furstenberg, a University of Pennsylvania sociology professor, said, "He felt the best of WASP culture represented the best virtues to which everyone could aspire: honor, hard work, respect, authority. Those with privilege must work to share it and have an obligation to those without privilege." In his book
Puritan Boston and Quaker Philadelphia (1979), Baltzell concluded that the
Quakers in
Philadelphia were less effective than the
Protestants of
Boston because of their traditions of modesty and egalitarianism. Baltzell was the
Danforth Fellow at the Society for Religion in Higher Education of the
Princeton Theological Seminary from 1967 to 1968. He was also a
Charles Warren Research Fellow at
Harvard University from 1972 to 1973, and
Guggenheim Fellow from 1978 to 1979. Baltzell retired from the University of Pennsylvania in 1986, and became
Emeritus Professor of history and sociology. == Professional affiliations ==