Conspiracy theories are usually conceived as explanations for events that provoke widespread social anxiety and uncertainty, conditions under which people are eager for explanations.
The message goes something like this -- this "Group" is up to something nefarious and are trying to conceal their activities from you, but you are too smart for that and can see through the "stories" they are telling you. The discovery of a conspiracy can be exciting in spite of the lack of corroborating evidence. Conspiracies survive in the public consciousness aided by psychological biases and distrust of official sources.
Death Conspiracy Theories
Questions the official cause of death and offers alternative theories.
Conspiracy theories about Jews spread by individuals and groups since at least the Middle Ages, often for religious reasons. Christians discriminated and even persecuted Jews as outliers. Some thought Jews poisoned people's wells. Examples of anti-semitic conspiracy theories:
Economic and Societal Conspiracy Theories
These conspiracy theories arise as explanations for events perceived by conspiracists as based on secret arrangements made by people and groups in power.
Other Common Conspiracy Theories
Modern conspiracy theories are propagated almost entirely on social media. Facebook, Twitter, Parler, Gab, and other platforms are free and fast, and allow for the instantaneous creation of communities that rally around unproven assertions or accusations. In fact, “Social media is the ideal carrier of conspiracism,” says Nancy L. Rosenblum, professor of ethics in politics and government at Harvard University. "Here’s why. It doesn't require evidence."
Read a short article about conspiracy theories from the library database, Credo Reference (below):