1910, the Cape Colony, Natal, the Orange River Colony and the Transvaal were merged into the new nation of South Africa, which was granted Dominion status. In September 1909, Kerr took part in the conference at Plas Newydd that led to the Round Table movement. He returned to England in 1910 to found and edit the Round Table Journal. At a meeting in London in January 1910, Kerr called for "an organic union to be brought about by the establishment of an imperial government constitutionally responsible to all the electors of the Empire, and with the power to act directly on individual citizens". In November 1910, Kerr became the first editor of The Round Table Journal, which attracted much attention with its plans to turn the empire into an imperial federation. In October 1911, Kerr suffered a nervous breakdown. During a visit to India in 1912, Kerr intensely studied the religions of the sub-continent such as Hinduism, which reflected his increasing disenchantment with Catholicism. After reading the book Science and Health with the Key to the Scriptures, Kerr converted to Christian Science. Kerr had contradictory impulses, combining what he considered to a "rational" approach to politics with a strong reverence for science together with a mystical, transcendent side of his personality that longed for something spiritual; the religion of Christian Science allowed him to combine his mysticism and belief in the supernatural together with his rationality and belief in science. In his article After Four Months of War that appeared in the December 1914 edition of The Round Table, Kerr called for "the voluntary federation of all free civilised states" as the best way to end war forever. In September 1915 edition of The Round Table in an article entitled The End of War, Kerr again called for a "world state" that would be a "a responsible and representative political authority" for the entire world as the best way to end the war. In June 1916 edition of The Round Table, Kerr in his article The principle of Peace, Kerr repeated his call for a "world state", saying the present international condition was "like that of the Western states of America in the early days...So long as independent behave like independent sovereign individuals, from time to time they will massacre each other in defense of what they believe to be their rights. And they will not cease from doing so