The six Gulf monarchies form a distinct bloc within the Arab world. Saudi Arabia seeks to dominate it and is presently entangled in a struggle for regional hegemony with Iran. The 2011 uprisings failed to overturn any of the monarchies,which all became acutely aware of the threat that these uprisings posed, andthen chose to accelerate reforms in response. Five of the Gulf countries have tiny indigenous populations, most outnumbered by foreign workers. They also haveenormous oil or gas wealth andambitious 2030 visions for development. In addition, the five all face the double challenge of having an expansionist Iran and domineering Saudi Arabia as neighbors. Since independence from Britain in 1971, they have dedicated themselves, several with notable success, to establishing modern states, national identities and a global stature. Meanwhile, under the leadership of Crown Prince Mohammed bin Salman, the Saudi kingdom is finally undergoing radical social and economic changes in the midst of unprecedented political repression and major resistance to the Saudi bid for regional primacy from both Iran and other increasingly independent-minded Gulf monarchies.In addition, U.S.-Saudi relations, the bedrock of Saudi stability and security, are deteriorating.