Which king is credited with bringing stability to the early Roman government?

Numa Pompilius is credited with bringing stability to the early Roman government through his emphasis on the establishment of religious and cultural institutions. He was the second king of Rome, succeeding Romulus, and is known for instituting many of the religious rites and ceremonies that underpinned Roman society. Numa's leadership is often characterized by a focus on peace and the consolidation of authority rather than military conquest, which distinguishes his reign as one that promoted sociopolitical stability in the fledgling city-state. His contributions to the organization of the calendar and the establishment of the priesthoods played a crucial role in creating a structured and harmonious society, setting the foundation for Rome's future governance.