Our inner lives are vast and complex. This unknowability is what makes us so very human, so very—oh, damn, just 74 feels.
In All the Feels, evolutionary psychologist Robert Kurzban explains the evolved function of every one of your emotions and sensations, from anger to the urge to yawn, organizing them the way biologists organize species, into four main Kingdoms and Monera, a cabinet of oddballs such as déjà vu and the mysterious urge to squeeze something cute. Understanding what each feeling is measuring, what it’s asking you to do, and why, will change the way you think about your feelings.