This is a list of alleged conspiracy theories. For a discussion of conspiracy theories in general, see conspiracy theory.

Table of contents
1 Global conspiracy theories
2 Conspiracy theories peculiar to the United States of America
3 Conspiracy theories peculiar to Canada
4 Conspiracy theories peculiar to the Arab and Muslim world

Global conspiracy theories

Conspiracy theories peculiar to the United States of America

Conspiracy theories peculiar to Canada

  • The Avro Arrow Cancellation
  • Conspiracy to remove George Radwanski, Privacy Commissioner of Canada, from office in order to silence him about attacks on civil liberties by the Canadian government

Conspiracy theories peculiar to the Arab and Muslim world

The Arab press and government have been promoting many Zionist conspiracy theories regarding the September 11, 2001 Terrorist Attacks. It is now considered a well accepted fact in much of the Arab and Muslim that "the Jews" or the "The Zionists" were behind the 9/11 terrorist attack, and that no Muslims, nor Al Qaeda, were involved.

Plot to murder Princess Diana
  • For some time the Arab press was reporting that that there was a plot by Jews to make Egyptian and Palestinian schoolgirls sexually promiscuous by selling them bubble-gum laced with aphrodisiacs. An example of this conspiracy theory is that written by Mohammad Dalbah:
"Palestinian authorities uncovered Israeli efforts to spread a special kind of gum that contains sexual hormone between Palestinians. The authorities requested laboratory tests on the gum which were conducted in Cairo. Those tests showed that the gum contains progesterone which is responsible for sexual arousal and also prevents pregnancies. Palestinian authorities confiscated 200 tonnes of gum in the city of al-Khalil alone. The Washington Post claimed in report that it asked a chemistry professor in the hebrew university to examine the gum. His tests were negative, however the paper also reported that the majority of Palestinians believe the conspiracy. It quoted one Palestinian saying that it was possible to send a space ship to Mars then it is possible to manufacture a 'sexual gum' it is after all a war. In other new, some Jewish and non-ethical Palestinians merchants sold expired flour in the west back and Gaza strip last spring. They also sold large quantities of baby milk when it was actually soya bean derivatives that were expired."
Another example of believer in the anti-Arab bubblegum conspiracy
This story is particularly interesting, as it closely resembles a story of LSD-laced papers or candies which continues to periodically surface in the US. In this case the story is considered to be an urban rumor as opposed to a conspiracy theory, because no group is blamed for the "attacks". Like the Palestinian case, there is no evidence that anything like this has ever happened.
Daniel Pipes has written an essay on the prevalence of conspiracy theories throughout the Arab and Muslim world. Conspiracy theories extend far beyond those biased against Jews. They extend even to the creation of conspiracy theories about the results of sporting events.