Campbell's the philosophy of rhetoric and the advancement of rhetorical theory: The integration of philosophical antecedents

George Campbell's The Philosophy of Rhetoric is one of the most significant works of rhetoric in the new‐classical period. Campbell's work provides an example of theory development, for his theory integrates competing psychological/philosophical theories of his era. Campbell's classification aligns the ends of discourse with specific mental faculties: Rhetors enlighten the understanding, please the imagination, move the passions, and influence the will. The philosophy of association underlies the materials for these appeals, utilizing ideas obtained from experience and memory. The foundation for this structure, common sense philosophy, supplies information (i.e., testimony) and assumptions essential to all reasoning. Implications for work on rhetorical theory development are addressed.