The Russian writer, thinker, and psychoanalyst Lou Andreas-Salomé is one of the most enigmatic women in European intellectual history — Lou Andreas-Salomé was an enigma for her contemporaries. She was beautiful, intelligent, and didn’t care about conventions. She was a woman ahead of her time — and the many men she excited. Born into nobility in St. Petersburg in 1861, Lou read philosophers such as Spinoza, Leibniz, and Kant and…