The Illuminati have deliberately created a number of threats that can be dealt with only through social organization and political power.
War and Terrorism
The Illuminat's view of war is expressed eloquently in The Report From Iron Mountain:
"The war system not only has been essential to the existence of nations as independent political entities, but has been equally indispensable to their stable internal political structure. Without it, no government has ever been able to obtain acquiescence in its "legitimacy," or right to rule its society. The possibility of war provides the sense of external necessity without which no government can long remain in power. The historical record reveals one instance after another where the failure of a regime to maintain the credibility of a war threat led to its dissolution, by the forces of private interest, or reactions to social injustice, or of other disintegrative elements. The organization of a society for the possibility of war is its principal political stabilizer. It is ironic that this primary function of war has been generally recognized by historians only where it has been expressly acknowledged--in the pirate societies of the great conquerors.
The basic authority of a modern state over its people resides in its war powers. (There is, in fact, good reason to believe that codified law had its origins in the rules of conduct established by military victors for dealing with the defeated enemy, which were later adapted to apply to all subject populations.) On a day-to-day basis, it is represented by the institution of police, armed organizations
charged expressly with dealing with "internal enemies" in a military manner. Like the conventional "external" military, the police are also substantially exempt from many civilian legal restraints on their social behavior. In some countries, the artificial distinction between police and other military forces does not exist. On the long-term basis, a government's emergency war powers -- inherent in the structure of even the most libertarian of nations -- define the most significant aspect of the relation between state and citizen.
...The arbitrary nature of war expenditures and of other military activities make them ideally suited to control these essential class relationships. Obviously, if the war system were to be discarded, new political machinery would be needed at once to serve this vital subfunction. Until it is developed, the continuance of the war system must be assured, if for no other reason, among others, than to preserve whatever quality and degree of poverty a society requires as an incentive, as well as to maintain the stability of its internal organization of power." 
In summary : it is essential to keep people down if the Illuminati are to stay on top and the people must be kept in a degree of poverty in order to motivate them to work for the Illuminati. For these reasons the Illuminati will continue to stage terrorist attacks and wars.
Ice Age Imminent / Global Warming / Climate Change
The Illuminati environmental agenda is to broadcast messages of global doom via the mainstream media in order to justify an ever increasing level of global social control. The objective is to solidify the status quo and, in the US, to corale the population into urban population centres and depopulate rural areas.
Below is a quote from The Report From Iron Mountain , written by a US Government think tank from 1963 to 1965 and published in 1967:
It may be, for instance, that gross pollution of the environment can eventually replace the possibility of mass destruction by nuclear weapons as the principal apparent threat to the survival of the species. Poisoning of the air, and of the principal sources of food and water supply, is already well advanced, and at first glance would seem promising in this respect; it constitutes a threat that can be dealt with only through social organization and political power. But from present indications it will be a generation to a generation and a half before environmental pollution, however severe, will be sufficiently menacing, on a global scale, to offer a possible basis for a solution.
Establishment think tanks are hanging on to the concept of global warming even though the public is disbelieving in increasing numbers. On April 2, 2012 the UK Daily Mail  reported:
An Oregon University professor has controversially compared skepticism of global warming to racism. Sociology and environmental studies professor Kari Norgaard wrote a paper criticising non-believers, suggesting that doubters need to be have a ‘sickness’... In the last 30 years, Norgaard said, climate change has been seen as either a hoax or fixable with minimal political or economic intervention. ‘This kind of cultural resistance to very significant social threat is something that we would expect in any society facing a massive threat’, she said.... The scientists behind the event recently put out a statement calling for humans to be packed into denser cities so that the rest of the planet can be surrendered to mother nature. And fellow attendee Yale University professor Karen Seto told MSNBC: ‘We certainly don’t want them (humans) strolling about the entire countryside. We want them to save land for nature by living closely [together].’
Now that global warming has become climate change and the US military have made known their intention to own the weather  we should expect increased use of covert weather modification to create humanitarian disasters due to devastating storms, tornados, hurricanes, floods and drought. Preparations are being made to deal with such disasters as demonstrated by Paddy Ashdown's Humanitarian Emergency Response Review  written for the UK Governments Department for International Development, which is seen by many as the United Nation's single, most-influential donor .
In the section describing substitues for the functions of war The Report from Iron Mountain offers the following political solutions:
a) An omnipresent, virtually omnipotent international police force. b) An established and recognized extraterrestrial menace. c) Massive global environmental pollution. d) Fictitious alternate enemies. 
The extra-terrestrial menace is a particularly useful tool under a one world government, although domestic terrorism would also serve. In April 2012 viewers down under were treated to Australia's Today Show interviewing air force military historian Professor Paul Springer on the United States' military preparedness for a possible extraterrestrial invasion TODAY: Alien invasion on MSN Video.
1. The Report from Iron Mountain, 1967, http://www.teachpeace.com/Report_from_Iron_Mountain.pdf
2. The Daily Mail, 'If you don't believe in climate change you must be sick': Oregon professor likens skepticism to racism, 31 March 2012, http://www.dailymail.co.uk/news/article-2123260/If-dont-believe-climate-change-sick-Oregon-professor-likens-skepticism-racism.html#ixzz1tiJZH800
3. US Air Force, Weather as a Force Multiplier: Owning the Weather in 2025, August 1996, http://csat.au.af.mil/2025/volume3/vol3ch15.pdf
4. Paddy Ashdown, Humanitarian Emergency Response Review, 28 March 2011, http://www.dfid.gov.uk/Documents/publications1/HERR.pdf
5. The Guardian, Britain losing influence in global crises, Paddy Ashdown warns, 28 March 2011, http://www.guardian.co.uk/global-development/2011/mar/28/britain-losing-influence-humanitarian-crises