Abstract
The accelerated development of media technologies in the last decade has not received an adequate response from society as a whole regarding the implementation of a set of ethical norms and legal regulations. This suggests that the environment in which information is created and disseminated has become distorted, allowing for the proliferation of fake news and the multiplication of populist messages.This article highlights how populist ideologies, amplified by the cultural paradigm of posttruth and fact-free societies, impact security culture by altering the Overton Window. This manipulation of public opinion changes the priorities and directions of security policy. Simultaneously, the article proposes a series of measures to counter fake news and the manipulation of public opinion through populist messages
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