The book takes a critical look at the phenomenon of disinformation by identifying the historical, technological and human elements that contribute to the current success of disinformation strategies. The author examines the origin of the word "Dezinformatsiya", used by Russian planners in the 1950s, to understand how military strategy has transformed into militarization of information. The book pays particular attention to the power of algorithmic platforms on the selection and dissemination of digital content and their role in the spread of misinformation. This influences traditional editorial practices, disintermediating the production and distribution of news and amplifying a particular human cognitive mechanism: confirmation bias. The author investigates the Italian case to identify general archetypes, and typical and salient elements of disinformation strategies. The results offer a further interpretative aspect to studying disinformation, which represents a fracture in the digital public sphere, a kind of irrational object circulating in a space believed to be governed by rational engagement norms. The book conclusively shows how polarizing narratives used in disinformation strategies are the expression of complex ideological undergrowth embodied in extremes of the political spectrum.