WHY DID HE Reign for so long?

He reigned for so long due to a combination of strong leadership, effective governance, and the ability to maintain stability within the realm. His policies likely promoted economic growth and social cohesion, which garnered public support. Additionally, the absence of significant opposition or crises may have contributed to the longevity of his rule. Finally, he may have successfully navigated political alliances and maintained the loyalty of key power players.