Literary theorists of the past half-century—who now dominate the humanities—encourage us to assume ill-intentions of one another. This contrasts with the 'empathetic' humanities, which aim for more understanding and less judging in our daily lives.
We can't make claims about human nature when studies only represent a narrow slice of humanity: mostly college students, middle-class respondents living near universities, and highly educated residents of wealthy, industrialized and democratic nations.
People turn to tribalism for a sense of certainty, as trust in institutions and commitment to truth erode. Instead, we need to restore a shared reality which builds common ground, regardless of identity group.
We are often sent messages that we shouldn’t feel negative emotions, so people are highly conditioned to want to change or get rid of their emotions, which leads to suppression, rumination, and/or avoidance—thus impeding our happiness.