Highlighting the work of social psychologist Roy Baumeister, Seppälä points out that our brain’s “tendency to give more weight to the negative may have helped our species survive by highlighting potential dangers.”

“However, in this day and age, our negativity bias, both as it relates to the environment and to our self-judgments, is harmful,” she writes.

Source: Psychologist says this mindset makes you happier and successful

Attributes of social media – especially the angry, negative posts – may be overloading our brain’s ability to cope with the scary. We really are better off focusing on the positive rather than the negative.