In an accompanying commentary, neurobiologist Dr. Larry Cahill explained that, due to political correctness, the topic of neurological sex differences was so taboo that a scientist risked ruining his career if he openly discussed them. Of course, this does a grievous disservice to both men and women, particularly when it comes to mental health.

It is well established in psychiatry that men and women suffer different rates of mental illness. Women are more likely to be depressed or anxious, while men are more likely to be addicted to and abuse drugs. Migraines are more common among women. Though the prevalence of schizophrenia is roughly the same for men and women, there is a notable sex difference in the age of onset of symptoms.

The bottom line is that there is overwhelming evidence to suggest that the brains of men and women differ, sometimes substantially. But a new book, which is making waves in the media, denies this.