The longevity of political regimes can be determined by various factors including economic stability, social cohesion, and the effectiveness of governance. A strong economy often leads to greater public support, while political instability or economic decline can lead to unrest. Additionally, the legitimacy of a regime, ability to adapt to change, and responsiveness to citizen needs play crucial roles. Political parties' strength and public sentiment towards governance can also affect regime stability. In essence, these combined factors create a complex web influencing the durability of political systems.