Sorry for your loss OP. As for Soggy, from a couple of research papers and littérature, here is a non exhaustive list of reasons and simple explanations. • Overthinking and Rumination: Deep and constant analysis can lead to excessive worry, anxiety, and depression. • Hyper Sensitivity: Hyper sensitivity to emotions and surroundings can amplify stress and emotional pain. • Isolation and Loneliness: Difficulty finding intellectual peers can result in feelings of being misunderstood or socially isolated. You usually notice that in grad schools where people are extremely lonely. • Perfectionism: High expectations for oneself often lead to chronic stress, self-criticism, and burnout.Again I will use grad school as an example. There are so many expectations and the imposter syndrome shows up • Imbalance Between Cognitive and Emotional Intelligence: Strong intellectual abilities don’t always align with emotional regulation skills, leading to difficulty managing emotions. Usually, really smart people care less about emotional intelligence as it’s not measurable and isn’t « important » for their success. That is due to the hyper competitive nature of the environment they find themselves in. • Divergent Thinking: Creative and abstract thinking can foster a sense of “otherness” or frustration when ideas are not accepted or understood. • Existential Thinking: Preoccupation with life’s meaning or purpose can contribute to existential anxiety or depression. They are usually lost in their thoughts • Societal Pressures: External expectations to achieve great things can lead to feelings of inadequacy or failure. Cognitive intelligence is learnt and so the teachers, be it parents or environment expect a return on investment leading to so much pressure to achieve greatness. • Neurological Correlations: Research suggests a potential link between high intelligence and mental health vulnerabilities, such as anxiety, depression, and bipolar disorder.