Israel/Palestine is an example of the failure of British post-colonial government policy
Britain failed to reach an agreement between Jews and Arabs in the region and withdrew in 1947, allowing the problem to descend into violence. This has lead to numerous wars, terrorism, ethnic tension and a break down of human rights in the region over long periods of time. This is a left over problem of British colonial rule, which the whole world seems unable to find a suitable resolution for.
During World War One this region was under the rule of the Ottoman Empire, and the British promised to recognise Arab independence in the area in return for Arab assistance to British forces, fighting against the Ottomans. Following the First World War and the fall of the Ottoman Empire, the British Empire took control of this region as “Mandatory Palestine”, seen as a betrayal to the Arabs in the region. In 1917 the British government made the Balfour Declaration, a public statement to support a national home for the Jewish people in Palestine, and in 1923 Britain gained consent from the League of Nations to control the region until a time when they are stable and “able to stand on their own” .
During this period of British control nationalism in both the Jewish and Arab communities increased both against the British and each other respectively. This lead to the Arab Revolt in 1936, the Jewish insurgency in 1938 and the beginning of the First Arab-Israeli War.