This also applies to other depressing mindsets such as nihilism/misanthropy or jubilant mindsets like idealism/φιλία.
I believe these mindsets probably oscilate through our minds, as we tend to imagine having more bad than good days or vice versa depending on which one fits in the context during a certain given time. However theres misanthropy that leads to violence and ιλία that leads to suicidal empathy? Its most likely an ancestrial trait, well I think a prolonged expression of certain feelings is an indication it was passed down.. Molecular lamarckism
Thoughts?