In the context of the Great Game between the British and Russian Empires for control of Central Asia, he held deep mistrust of Russian intentions. This led him to encourage British trade in Persia, and he paid a visit to the Persian Gulf in 1903. Curzon argued for an exclusive British presence in the Gulf, a policy originally proposed by John Malcolm. The British government was already making agreements with local sheiks/tribal leaders along the Persian Gulf coast to this end. Curzon had convinced his government to establish Britain as the unofficial protector of Kuwait with the Anglo-Kuwaiti Agreement of 1899. The Lansdowne Declaration in 1903 stated that the British would counter any other European power's attempt to establish a military presence in the Gulf. Only four years later this position was abandoned and the Persian Gulf declared a neutral zone in the Anglo-Russian Agreement of 1907, prompted in part by the high economic cost of defending India from Russian advances.