Petroleum has built nations, funded regimes, and redrawn global alliances. Petrostates and Power: Saudi Arabia, Iran, Russia and Beyond explores how oil‑rich countries wield economic might as strategic influence. Through historical and geopolitical analysis, the book traces how petrostates converted resource wealth into political capital—shaping wars, diplomacy, and domestic power structures. From the Saudi‑led energy diplomacy of the Gulf to Russia's leverage in Europe and Iran's defiance under sanctions, it unveils the complex interplay between resource dependence and sovereignty. This is the story of how oil not only fuels the world, but engineers the very balance of modern power.