Numa Pompilius
Seven Roman Kings - Numa Pompilius
To provide themselves with wives, the Romans (during Romulus' reign) had forcibly taken Sabine women.
In the interests of harmony, the wives persuaded their husbands and fathers not to slaughter each other, but maintaining peace hadn't been easy. When Romulus died, the Sabines refused to permit another Roman power over them, so the Romans agreed to a Sabine king, but one of their choosing -- the honorable and universally acceptable Numa Pompilius.