There is some research [1] to suggest that intelligence (ability) is correlated with depression. So reversing the title's causality: People who see the world

There is some research [1] to suggest that intelligence (ability) is correlated with depression. So reversing the title's causality: People who see the world realistically are more depressed. [1] https://www.scientificamerican.com/article/bad-news-for-the-highly-intelligent/ https://www.scientificamerican.com/article/bad-news-for-the-...