Politically motivated conspiracy theories and its usage

A conspiracy theory is an explanation for an event or situation that invokes a conspiracy by sinister and powerful groups, often political in motivation, when other explanations are more probable. The term has a pejorative connotation, implying that the appeal to a conspiracy is based on prejudice or insufficient evidence.

Conspiracy theories resist falsification and are reinforced by circular reasoning: both evidence against the conspiracy and an absence of evidence for it are re-interpreted as evidence of its truth, whereby the conspiracy becomes a matter of faith rather than something that can be proved or disproved. Research suggests that conspiracist ideation—belief in conspiracy theories—can be psychologically harmful or pathological and that it is correlated with psychological projection, paranoia and Machiavellianism. Psychologists attribute finding a conspiracy where there is none to a mental illness called illusory pattern perception.

Conspiracy theories once limited to fringe audiences have become commonplace in mass media, emerging as a cultural phenomenon of the late 20th and early 21st centuries–from Wikipedia