Jack of Newbury's surface realism in characters, setting, and speech has led to an underestimation of its historical and literary value. A close reading reveals the consistent use of the Greco-Roman ethical-political conception of the state, epitomized in the figure of the ruler. Deloney shows his familiarity with this tradition, probably known to him through Erasmus and Sidney, in the three controlling motifs of his novel. First, the middle class of weavers, represented in Jack's household and dramatized in allegories and symbols, is portrayed as a self-sufficient state where peace and harmony reign. Second, this state is shown to be such because of the nature of its ruler, Jack, a benevolent, generous, wise man. Third, the middle-class way of life—hard work, thriftiness, material gains—serves as princely education; accordingly, Jack, from a menial position, goes on to become ruler of the state. Jack of Newbury, as a systematical reordering of an aristocratic tradition, represents the world view of the emergent middle class; and as such, a momentous shift in the social temper of the Renaissance and an important step in the evolution of the novel.