Chapter 6: Emotional and Social Intelligence

The text establishes that the "sense of reality" is not a given but is actively maintained by the right hemisphere; consequently, right-hemisphere dysfunction is linked to derealization, schizophrenia, and delusional states like Capgras syndrome (believing loved ones are impostors), whereas left-hemisphere damage often leaves the sense of reality intact or even heightened. The author challenges the traditional "valence hypothesis"—which claims the left hemisphere handles positive emotions and the right handles negative ones—and instead proposes that the right hemisphere is responsible for all emotional depth, social bonding, and sadness associated with empathy, while the left hemisphere is primarily specialized for anger, irritability, and self-promoting rivalry. This theory is supported by ethological evidence, such as the universal tendency of mothers (and great apes) to cradle infants on the left to engage the right hemisphere, and neuroanatomical findings regarding von Economo neurons, which are crucial for social intuition and are more numerous in the right hemisphere. The chapter also reframes "Theory of Mind," suggesting that while the left hemisphere may identify what an action is, it requires the right hemisphere to understand the why—the deeper intent and feelings of others. Furthermore, the discussion extends to language and narrative, demonstrating that the right hemisphere is essential for processing metaphor, irony, humor, and the coherent flow of a story, whereas the isolated left hemisphere relies on clichés, literal interpretations, and often confabulates when it lacks understanding. Ultimately, the chapter asserts that true rationality and social connection are grounded in the right hemisphere's capacity for embodied, contextual understanding.