Of course the author says that! He has cats, he must be infected too!
But seriously, the claim wasn't that the parasite immediately kills people but makes them more disposed towards self-destructive behavior. The fact that, 2000 years after people started living with cats, humanity yet survives isn't really absolute proof to the contrary.
Well, article claims that people really have started living with cats (that is, keeping them as pets) since 18th century in France, which is also when schizophrenia started to spread. So yeah, just over a century later and by the looks of it humanity is lucky to still survive!
Imagine how different life would have been now without that crazy infected folk who like dangerous driving and become obsessed with insane ideas. =)
By the way, can anyone clarify—is there a way to detect toxoplasmosis even in latent form? It seems from Wikipedia article that blood tests can't provide reliable results here.
Maybe we have evolved with the influence of cats, who are really in power. They use us to achieve their objectives (mining for gold for some reason maybe?). The toxins keep us under control. It makes so much sense!
But seriously, the claim wasn't that the parasite immediately kills people but makes them more disposed towards self-destructive behavior. The fact that, 2000 years after people started living with cats, humanity yet survives isn't really absolute proof to the contrary.