A civil war is a war between organized groups within the same state or republic, or, less commonly, between two countries created from a formerly united state. The aim of one side may be to take control of the country or a region, to achieve independence for a region, or to change government policies. Civil wars since the end of World War II have lasted on average just over four years, a dramatic rise from the one-and-a-half year average of the 1900-1944 period. While the rate of emergence of new civil wars has been relatively steady since the mid-19th century, the increasing length of those wars resulted in increasing numbers of wars ongoing at any one time. For example, there were no more than five civil wars underway simultaneously in the first half of the 20th century while over 20 concurrent civil wars were occurring close to the end of the Cold War before it ended. Since 1945, civil wars have resulted in the deaths of over 25 million people, as well as the forced displacement of millions more. Civil wars have further resulted in economic collapse; Somalia, Burma, Uganda and Angola are examples of nations that were considered to have promising futures before being engulfed in civil wars. Formal classification James Fearon, a scholar of civil wars at Stanford University, defines a civil war as “a violent conflict within a country fought by organized groups that aim to take power at the center or in a region, or to change government policies”. The Correlates of War, a dataset widely used by scholars of conflict, classifies civil wars as having over 1000 war-related casualties per year of conflict. This rate is a small fraction of the millions killed in the Second Sudanese Civil War and Cambodian Civil War, for example, but excludes several highly publicized conflicts, such as The Troubles of Northern Ireland and the struggle of the African National Congress in Apartheid-era South Africa. That the Party in revolt against the de jure Government possesses an organized military force, an authority responsible for its acts, acting within a determinate territory and having the means of respecting and ensuring respect for the Convention. That the legal Government is obliged to have recourse to the regular military forces against insurgents organized as military and in possession of a part of the national territory. That the de jure Government has recognized the insurgents as belligerents; or That it has claimed for itself the rights of a belligerent; or That it has accorded the insurgents recognition as belligerents for the purposes only of the present Convention; or That the dispute has been admitted to the agenda of the Security Council or the General Assembly of the United Nations as being a threat to international peace, a breach of the peace, or an act of aggression. That the insurgents have an organization purporting to have the characteristics of a State. That the insurgent civil authority exercises de facto authority over the population within a determinate portion of the national territory. That the armed forces act under the direction of an organized authority and are prepared to observe the ordinary laws of war. That the insurgent civil authority agrees to be bound by the provisions of the Convention. Causes of civil war in the Collier-Hoeffler Model Scholars investigating the cause of civil war are attracted by two opposing theories, greed versus grievance. Roughly stated: are conflicts caused by who people are, whether that be defined in terms of ethnicity, religion or other social affiliation, or do conflicts begin because it is in the economic best interests of individuals and groups to start them? Scholarly analysis supports the conclusion that economic and structural factors are more important.