“…In relation to kinds of conflicts, authors like Bjorkvist, Lagerspetz & Kaukiainen (1992), Atkins, Stoff, Osborne & Browne (1993), Crick & Grotpeter (1995) Archer & Coyne (2005) and Zimmer-Gemback, Geiger & Crick (2005), describe different classifications that join three great groups of conflicts (physical, psychological and verbal violence). Some authors (Slee & Rigby, 1993;Baldry & Farrington, 1998;Anderson et al 2003;Berguno, Leroux, McAinsh & Shaikh, 2004;Andreou, 2000Andreou, , 2001Andreou, , 2004Andreou, and 2006Cava, Musitu & Murgui, 2007;Pelegrín & Garcés de los Fayos, 2008;De Bruyn, Cillessen & Wissink, 2010), differ four principal causes of conflicts: familiar, social, personal and scholar causes. Other studies (Baldry & Farrington, 2005;Gentile et al, 2009;Greitemeyer & Osswald, 2009;) affirm that the lack of protective factors among young people, joined to risk factors increases noticeably the likelihood of violent situations in school.…”