Octopuses have been studied extensively for their intelligence. They are said to have the smarts of a golden retriever, which is pretty impressive.
In studies scientists have found that individual octopuses display different personalities. Some octopuses were shier than others (!) Even more interesting – the personality traits seem to be inherited by their offspring.
It’s not hard then to imagine that humans inherit certain personality traits from their parents. And if these traits include a propensity for introspection, or dwelling on their situation, someone’s genealogy could affect certain psychological traits, and aspects of their mental health.
Just something to ponder on.