Nervous ills, their cause and cure

"Nervous Ills, Their Cause and Cure" by Boris Sidis is a exploration into the human mind, specifically focusing on the connection between fear and mental disorders. Sidis challenges popular ideas of his time, arguing that self-preservation and fear are key to understanding why people act the way they do. Sidis believes fear is a basic instinct that helps us survive, but it can also cause mental and physical problems when it goes wrong; to illustrate his points, Sidis uses examples to show how fear can create different health issues, and he goes against theories that focus too much on sexual drives, and provides a different way of looking at the causes of mental illness.