How did Cicero’s speeches influence Latin prose and rhetoric?

Cicero’s speeches fundamentally transformed Latin prose and rhetoric by establishing the "periodic" style, a sophisticated structure where phrases are balanced against one another and subordinate clauses are woven into a complex, coherent whole. By refusing to align exclusively with the florid "Asiatic" school or the stark "Atticist" style, he championed an eclectic approach that blended various techniques to suit the subject matter.12

His influence on the Latin language was profound, as he perfected it as a literary medium capable of expressing abstract and complex thoughts with clarity. He introduced important quantitative prose rhythms, particularly in the closing cadences of his sentences, which were designed to appeal to the ears of his audience.31

Cicero’s impact was so enduring that for centuries, Latin prose was defined by either a return to his style or a reaction against it. His methods, documented in works like De oratore, became a cornerstone of education, influencing later rhetoricians such as Quintilian and shaping the development of prose in both Latin and later vernacular languages.32