As the nagging interaction that starts out in a calm and polite manner which continues and persuader becomes more repetitive, the interaction is more likely to become aggressive in nature.
However, a great deal of diplomacy in establishing allies, bartering land, and signing peace treaties was necessary for each warring state, and the idealized role of the persuader/diplomat developed.
Propaganda sometimes resulted from the explicit intentions of a persuader but also could be unintentional, as when educators indirectly transmitted the social heritage of a culture.