and wages during Hussein's rule. With the U.S. invasion and the fall of Hussein, thousands of Sunnis were left without jobs, leading them to join the insurgency. Control of oil was also a factor, thanks to non-existent legislation on the dispersal of oil revenues. Use of "civil war" label The use of the term "civil war" has been controversial, with a number of commentators preferring the term "civil conflict". A weak state, defined as lacking legitimacy, capacity and effective and functional institutions, is the main permissive cause of civil war. A poll of over 5,000 Iraqi nationals found that 27% of polled Iraqi residents agreed that Iraq was in a civil war, while 61% thought Iraq was not. Two similar polls of Americans conducted in 2006 found that between 65% to 85% believed Iraq was in a civil war. In the United States, the term has been politicized. Deputy leader of the United States Senate, Dick Durbin, referred to "this civil war in Iraq" in a criticism of the President's Address to the Nation by George W. Bush's on 10 January 2007. Edward Wong on 26 November 2006 paraphrased a report from a group of American professors at Stanford University that the insurgency in Iraq amounted to the classic definition of a civil war. An unclassified summary of the 90-page January 2007 National Intelligence Estimate, titled Prospects for Iraq's Stability: A Challenging Road Ahead, states the following regarding the use of the term "civil war": The Intelligence Community judges that the term "civil war" does not adequately capture the complexity of the conflict in Iraq, which includes extensive Shi'a-on-Shi'a violence, al-Qa'ida and Sunni insurgent attacks on Coalition forces, and widespread criminally motivated violence. Nonetheless, the term "civil war" accurately describes key elements of the Iraqi conflict, including the hardening of ethno-sectarian identities, a sea change in the character of the violence, ethno-sectarian mobilization, and population displacements. Retired United States Army General Barry McCaffrey issued a report on 26 March 2007, after a trip and analysis of the situation in Iraq. The report labeled the situation a "low-grade civil war". In page 3 of the report, he writes that: See also Iraq conflict (2003–present) Casualties of the conflict in Iraq since 2003 Shi'a–Sunni relations Iraqi insurgency Refugees of Iraq Events: 2 March 2004 Iraq Ashura bombings 23 November 2006 Sadr City bombings 22 January 2007 Baghdad bombings 3 February 2007 Baghdad