Anger fuels the vortex of social violence. At least half of American drivers express road rage. 90% of those on the road feel threatened by the aggression. 56% of fatal car accidents, which kill ~40,000 Americans each year, result from aggressive driving.
The universality of anger is shown by how readily social media mobs rush to judgment and express outrage. Anger is the emotion that spreads most easily on social media networks. Death threats through social media have become common.
Anger is more influential than other emotions like joy. ~ Chinese sociologist Rui Fan et al
Whereas happiness is an intimate emotion, shared only with close friends, people are willing to share anger with strangers.