In a world governed by technology and scientific progress, there seems to be no room for ignorance, speculation, and baseless hypotheses. Yet, contrary to common sense, many fiercely defend conspiracy theories and believe the most improbable claims. For example, that the Earth is flat, climate change is a hoax, and the coronavirus is a biological weapon.

Philosopher of science and educator Lee McIntyre has met with dozens of dissenters and created an engaging guide to this irrational community. He has managed to understand how it is structured, how to communicate with its adherents, and which arguments are effective. He is convinced that science deniers must be persuaded, as their misconceptions can sometimes be deadly.