Gamal Abdel Nasser Hussein (; Arabic: جمال عبد الناصر حسين‎; 15 January 1918 – 28 September 1970) was an Egyptian revolutionary, and, along with Mohamed Naguib, one of the two principal leaders of the Egyptian Revolution of 1952 that toppled the monarchy of Egypt and Sudan, ended the United Kingdom's occupation of Egypt, and introduced wholesale agrarian reform. An advocate of rapid, radical political and economic change, Nasser replaced the more gradualist Naguib in 1954 before becoming the second President of Egypt in 1956, beginning a new period of modernisation, and socialist reform in Egypt, together with a profound advancement of pan-Arabism, and support for anti-imperialism and decolonisation across the Third World.