Who's to say that one conspiracy story or another won't eventually turn out to be true? The whistleblower Edward Snowden was able to prove that the US National Security Agency (NSA) monitors large parts of online communication. In the 1980s, the so-called Iran-Contra affair caused a stir: despite an arms embargo, U.S. authorities had secretly sold weapons to Iran in order to use the profits to financially support the Contra rebels in Nicaragua - all without the U.S. Congress. At the height of the Cold War, the MK-Ultra research program funded numerous secret projects, including studies to test LSD and mescaline as truth serums and experiments in mind control. There was even a CIA project that attempted to turn live cats into listening devices using surgically implanted microphones. With reference to similar programs in Russia, all sorts of nonsense was apparently being promoted at the time.
Stories of real-life conspiracies can also be found in health care. The Syphilis Study in Alabama between 1932 and 1972 investigated the course of syphilis infections. In the study, 399 black Americans who were already infected were not told that they had the disease because the scientists wanted to observe how the disease progressed without treatment. The researchers had accepted that the patients would unknowingly infect their partners and children with syphilis. By the time the case became public in 1972, many of the study participants had died.
In business, too, real conspiracies are uncovered time and again. In the VW diesel affair, customers and authorities were deceived with manipulated emissions tests. The financial services provider and former "miracle" startup Wirecard presented itself with inflated figures in such a way that it was praised by politicians and businesspeople all over the world, so that investors all over the world took notice and invested a lot of money in it (which they haven't gotten back yet and won't get back). And in the U.S. there were several lawsuits against drug companies, big chains and pharmacy chains. They were accused of deliberately causing tens of thousands of patients to become addicted to opiates.
So where is the healthy line between healthy suspicion and a tangible conspiracy story? The fact is that the foundation and basic premise of a conspiracy narrative, the conspiracy itself, inspires further thought. It is also problematic that one's own thoughts are not questioned and are considered correct internally (the brain) and externally (the private environment, but also the general public, for example through postings on social media) and communicated for persuasion. As a result, we are no longer receptive to genuine, rational arguments, which leads to the manifestation of world views and can lead to the use of violence in the event of disagreement.
However, people who are suspicious of the actual purpose of something (e.g., the policy of guarding against the spread of the coronavirus and deciding on any restrictions to protect the population) would be wrong to blanketly place them in the conspiracy community. In countries with limited or no freedom of the press, it is plausible to view some media as an extension of the ruling party (as seen in Russia, where the pro-government media dismiss Putin's war as demilitarizing Ukraine and peacemaking). Being critical of government actions is not a bad thing per se: Democracies do not rely solely on trust for good reason, but have established checks and balances through the separation of powers to minimize the risk of abuse of power. Making assumptions about possible conspiracies and implausible "official" explanations is part of political debate. Such debates can also have positive effects, such as the demand for more transparency in political processes and institutions such as intelligence services.
Nevertheless, a threshold is crossed at the latest when it is no longer a matter of discussing hypotheses and probabilities - knowing that there is still a lack of evidence - but when doubt becomes a belief, a narrative, or even an ideology. When mistrust reaches such a level that the controlling authorities are no longer trusted, even when there are no objective reasons for doing so. When people see conspiracies where there are none. And when they want to keep on believing, even when all the facts are against them.