Interesting study out of the UK.

Seems that social exclusion (e.g. the premier method of interpersonal violence among girls age 3 and up) is worse for people's mental health than straight-up aggression (e.g. the way of men).

http://www.dailymail.co.uk/sciencetech/article-2644101/Being-ignored-WORSE-bullied-Ostracism-psychologically-damaging-claim-experts.html