Social psychology manipulation mechanisms.
Sounds really high-tech, but Lille has long mastered this technology—
The ctOS he implemented in New York is the prerequisite technical condition for such control, enabling comprehensive surveillance, high-level authority for information dissemination, and bombardment capability, forcibly deepening the public's impression of a certain concept, and even... implanting some thoughts.
The simplest way, if there is an election in a year, you only need 24 hours of non-stop, seam drilling insertion of related advertisements and segments into citizens' phones to promote one of the candidates. Then, on election day, the other candidates are nothing.
Of course, some people will resent the information bombardment, creating side effects for the election...