How Testosterone Allowed Norman Geschwind to Bridge an Intellectual Century

The Center for the History of Medicine at the Francis A. Countway Library in Boston is magnificent! But very cold. I guess I brought the wrong clothes, being spoiled by Philly summers (or what shall I call it?).

I have been here for three weeks now, and will stay for one more. I am slowly making way through Norman Geschwind’s papers. Geschwind and his colleagues’ theory from the early 1980s is quite (in)famous among science critics.

Frankly, Geschwind and his colleagues almost designed a Grand Unified Theory of humanity there. The level of testosterone in prenatal life, so they suggested, affects the asymmetrical maturation of a human brain, and by extension one’s immune system, sexual orientation, language abilities, handedness and much more. Continue reading