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Glossary · Definition

Conspiracy theory

A conspiracy theory is an explanation of events that attributes them to a secret plot by a powerful group, usually in a way that resists correction because contrary evidence is read as part of the cover-up.

Last updated September 28, 2026

What defines a conspiracy theory

Not every claim about a conspiracy is a conspiracy theory in this sense. Real conspiracies exist and are documented in courts, filings and journalism. The term describes an explanatory pattern: a hidden group is said to be responsible, the evidence against the theory is treated as further proof, and the account expands to absorb new events. Theories often attach to moments of uncertainty such as an election, an attack, a health emergency or a corporate failure.

How they spread

A theory tends to circulate as a bundle of small, shareable claims rather than as a single coherent argument. Communities on forums and messaging platforms build the material, and larger accounts, sometimes with an interest in attention, carry it to wider audiences. Analysts treat a theory as a narrative with a life cycle: a trigger, a core claim, variations that suit different audiences, and eventual absorption or decay. For that reason it is studied with the same tools as other narratives. See narrative intelligence.

Example

A hypothetical case: after a plant accident, a claim spreads that the company staged the event to hide financial losses. The claim gains detail over several days, and each official statement is quoted as evidence of concealment. The company has no way to rebut every version, so the useful information is which versions reach reporters, employees and regulators.

Why it matters to communications and risk teams

Organizations rarely persuade committed believers, and arguing point by point can extend the story's life. The realistic goals are to keep accurate information easy to find for people who are undecided, to protect employees who are targeted, and to watch whether the theory is migrating from fringe channels into mainstream coverage or into the views of stakeholders such as investors or regulators. PeakMetrics has written about how such narratives moved around a live event in its analysis of conspiracies in the 2024 debate coverage.

How teams track a theory over time

Because theories mutate, a single keyword search will miss variants. Analysts keep a list of the core claims, the names and phrases used for each, and the communities carrying them, and they update it as new versions appear. They record which accounts introduce new elements and which sources cite the theory as fact. This history is what allows a team to say when a claim entered wider circulation and who moved it there.

Common misconceptions

Believing one theory does not mean a person believes all of them, and the audience is not limited to any single political group. A theory being widely shared is also not evidence that a coordinated campaign started it. Some are organic; some are pushed, and telling the two apart takes analysis of the accounts and timing involved.

See how these signals show up in your own coverage on the PeakMetrics platform or run the free AI Perceptions check. Back to the glossary.

Track these signals in your own coverage.

PeakMetrics follows news, social and broadcast sources, and what AI assistants say about your organization.