Baltzell traces the differences in class authority and leadership in these two cites to the contrasting values of the Puritan founders of the Bay Colony and the Quaker founders of the City of Brotherly Love. While Puritans placed great value on the "calling" or devotion to one's chosen vocation, Quakers have always placed more emphasis on being a good person than on being a good judge or statesman. Puritan Boston and Quaker Philadelphia presents a provocative view of two contrasting upper classes and also reflects the author's larger concern with the conflicting values of hierarchy and egalitarianism in American history.