On 21 April 1966 the emperor landed at Kingston to a crowd estimated at a hundred thousand, so dense that he could not leave the aircraft until Mortimer Planno, a respected Rastafari elder, was brought up the steps to speak to the people. The visit is kept as Grounation Day, the movement's major holy day, and it changed Rastafari practically as well as devotionally: he granted land at Shashamane in Ethiopia for settlement by people of African descent in the western hemisphere, and encouraged repatriation to be pursued alongside, rather than before, the liberation of the diaspora where it stood.
His public life outside the movement was a long argument for the sovereignty of small states. When fascist Italy invaded Ethiopia in 1935 with aircraft and mustard gas, he went in person to the League of Nations at Geneva in June 1936 to ask for the collective security the League had promised, was heckled by Italian journalists, and told the assembly that the same fate awaited others if aggression went unanswered. He spent five years in exile in England and returned in 1941. In 1963 he was among the founders of the Organization of African Unity, and his address to the United Nations that year, arguing that peace is impossible while any doctrine holds one race superior to another, was set almost word for word by Bob Marley as the song War.
His last years were not a triumph. Famine in Wollo in 1973, concealed by the government and then exposed on foreign television, destroyed the regime's standing, and in September 1974 a military committee, the Derg, deposed him. He died in the palace on 27 August 1975. The Derg reported natural causes; his physician and his family did not accept it. His remains were recovered in 1992 and given an imperial burial in 2000.