Greco-Roman paganism never speaks of helping the weak. For instance. Rather, they were thrown into the circus. — Primperan
Which is one of the reasons the Christians screwed them in the end. The pagan Roman's lack of empathy for the weak was their weakness.
But it does not follow that the Romans of old had no interest in duty, or had no moral values. They just had different values than the Christian ones... As often the case with Indo-European cultures, the Roman values originally were very warlike. They started with the general concept of virtus (from which comes the English word "virtue"), meaning 'manliness' (vir=man).
Then this concept evolved overtime and expanded to become lists of
several virtus.
The Roman state, be it the Republic or Empire, never issued a formal, codified list of virtus, nor much definition of the concept, which was from old time religion and probably so ubiquitous that no one needed a definition or a list. Therefore any such list is a modern construct patched together from various ancient authors. This caveat said, here is one from wikipedia:
Abundantia: "Abundance, Plenty" The ideal of there being enough food and prosperity for all segments of society. A public virtue.
Auctoritas – "spiritual authority" – the sense of one's social standing, built up through experience, Pietas, and Industria. This was considered to be essential for a magistrate's ability to enforce law and order.
Comitas – "humour" – ease of manner, courtesy, openness, and friendliness.
Constantia – "perseverance" – military stamina, as well as general mental and physical endurance in the face of hardship.
Clementia – "mercy" – mildness and gentleness, and the ability to set aside previous transgressions.
Dignitas – "dignity" – a sense of self-worth, personal self-respect and self-esteem.
Disciplina – "discipline" – considered essential to military excellence; also connotes adherence to the legal system, and upholding the duties of citizenship.
Fides – "good faith" – mutual trust and reciprocal dealings in both government and commerce (public affairs), a breach meant legal and religious consequences.
Firmitas – "tenacity" – strength of mind, and the ability to stick to one's purpose at hand without wavering.
Frugalitas – "frugality" – economy and simplicity in lifestyle.
Gravitas – "gravity" – a sense of the importance of the matter at hand; responsibility, and being earnest.
Honestas – "respectability" – the image and honor that one presents as a respectable member of society.
Humanitas – "humanity" – refinement, civilization, learning, and generally being cultured.
Industria – "industriousness" – hard work.
Innocencia – "selfless" – Roman charity, always give without expectation of recognition, always give while expecting no personal gain, incorruptibility.
Laetitia – "Joy, Gladness" – The celebration of thanksgiving, often of the resolution of crisis, a public virtue.
Nobilitas – "Nobility" – Man of fine appearance, deserving of honor, highly esteemed social rank, and, or, nobility of birth, a public virtue.
Justitia – "justice" – sense of moral worth to an action; personified by the goddess Iustitia, the Roman counterpart to the Greek Themis.
Pietas – "dutifulness" – more than religious piety; a respect for the natural order: socially, politically, and religiously. Includes ideas of patriotism, fulfillment of pious obligation to the gods, and honoring other human beings, especially in terms of the patron and client relationship, considered essential to an orderly society.
Prudentia – "prudence" – foresight, wisdom, and personal discretion.
Salubritas – "wholesomeness" – general health and cleanliness, personified in the deity Salus.
Severitas – "sternness" – self-control, considered to be tied directly to the virtue of gravitas.
Veritas – "truthfulness" – honesty in dealing with others, personified by the goddess Veritas. Veritas, being the mother of Virtus, was considered the root of all virtue; a person living an honest life was bound to be virtuous.
Virtus – "manliness" – valor, excellence, courage, character, and worth.