As far as British interests were concerned, Abdur Rahman answered their prayers: a forceful, intelligent leader capable of welding his divided people into a state; and he was willing to accept limitations to his power imposed by British control of his country's foreign affairs and the British buffer state policy. His twenty-one-year reign was marked by efforts to modernize and establish control of the kingdom, whose boundaries were delineated by the two empires bordering it. Abdur Rahman turned his considerable energies to what evolved into the creation of the modern state of Afghanistan.