“Thematic” political correctness is directed against specific words and opinions, ignoring that words do not have a unique and unalterable content, but their meaning depends on many factors, such as the place, time and language in which they are spoken. On the other hand, “ad hominem” (personalized) political correctness targets individuals because of their positions or their history. Personalized political correctness, whose victims include Thomas Jefferson and Winston Churchill, is based on a Manichean logic of absolute distinction between “good” and “evil” and classifies people as “acceptable” and “unacceptable”, subjecting historical personalities to a “purity test” disconnected from the historical context in which they acted. But history consists not only of positive but also of negative moments, and the disappearance of these negative moments through political correctness leads to a deficit in education.