Romans are guided by three principles in their Polytheism. First, Do ut des (I give that you may give) focuses on the reciprocity between the people and their Gods. Second, Ius divinus (sacred law) governs the right relations between humans and Gods. Finally, Pax deorum (peace of the Gods) stresses maintaining harmony between people and the Gods. These principles are rooted in pietas (piety). For Romans, this includes devotion to their families, the Gods, and their communities.
Added to that are the many public and private virtues that every Roman aspires to. Of the list of private virtues relevant to political action would be dignitas (a sense of self-worth), firmitas (tenacity), gravitas (a sense of the importance of the matter), prudentia (personal discretion), severitas (self-control) and finally veritas (honesty). These particular virtues both guide the conduct of the Roman Polytheist in politics, as well as define how to be an effective advocate. Following these virtues ensures that one does not degrade those for whom they advocate nor the Gods Themselves.
Meanwhile public Roman virtues provide a structure on what to advocate for. Abundantia is enough food for all. Aequitas is fair dealing between the government and the people. When conducting affairs let concordia (harmony between nations and between people) and fides (good faith in contracts) be the guides. Iustitia points to having sensible laws, and salus, the concern for public welfare. In the throes of advocacy, bonus eventus (remembering positive events) and fortuna (acknowledging positive events) should not be forgotten.
Virtues who are Gods:
Abundantia: With her cornucopia, this Goddess distributes grain and money to all.
Aequitas: Aequitas is the God of Equity.
Bonus Eventus: Depicted with a patera (cup) in his right hand and a wheat shaft in the left, this God ensures good harvests and successful enterprises.
Concordia: This important Goddess has a festival on July 22.
Felicitas (Prosperity): This Goddess represents the best aspects of communities.
Fides: This Goddess oversees oral contracts between people.
Libertas (Liberty): This Goddess personifies liberty in all its aspects – personal and political.
Pax (Peace): When Augustus re-established peace after the Roman Civil War, he made Pax a Goddess.
Pietas: This Goddess is usually portrayed with a stork, a symbol of filial duty.
Pudicita (Modesty): This Goddess, once represented the modesty of women, but later oversaw the moral uprightness of citizens.
Salus: This ancient Goddess also preserves public health.
Spes (Hope): Depicted about to depart, this Goddess holds an opening flower.
Virtus (Virtue) and Honos (Honor): These two Gods are usually worshipped together. They are also Gods of Military Courage and Honor.