Some scholars suggest that people formulate conspiracy theories to explain, for example, power relations in social groups and the existence of evil forces. It has been suggested by some thinkers that conspiracy theories have chiefly psychological or socio-political origins. Proposed psychological origins include projection; the personal need to explain “a significant event [with] a significant cause;" and the product of various kinds and stages of thought disorder, such as paranoid disposition, ranging in severity to diagnosable mental illnesses. Similarly, socio-political origins may be discovered in the need of people to believe in event causation rather than suffer the insecurity of a random world and universe.