2bf3b5d0_cal_Morals_and_Social_Disaster__Brief_Explanation
['Vice'] Wrath/Anger [Virtues which requires it] Patience, Friendliness [Brief Explanation] 
If we did not feel angry we wouldn't know how to avoid angering others. We wouldn't respect other's personal views, space or property unless we knew the anger that such violations cause. Suppressing ones anger is psychologically dangerous and leads to unstable outbursts of violence. We get angry about injustice. No anger = no social constraints.
Christian Moral Theory and Morality in Action: Biblical Morals and Social Disaster
Brief Explanation