Why did it take decades to officially admit that tobacco was dangerous to health? Why is it that a large part of the population still believes that human activities have no impact on climate change? Are neonicotinoid pesticides really responsible for the excess mortality of bees? Why has the recognition of bisphenol A as an endocrine disruptor motivated only timid bans? Through these “textbook cases” which, from laboratories to social networks, are all the result of battles planned with millions of dollars and euros, this investigation straddling Europe and the United States reveals the contours of a little-known offensive, which was nevertheless launched as early as the 1950s.