Factional fighting among students exists at all levels, from a single campus or institution to international congresses. At any one university, for example, it exists in student governmental bodies; between individual student clubs, unions and societies; between enrolments in different faculties; between upper and lower year classes; between the more privileged financially and the less privileged; and between differing life-styles, religions and races. Between institutions, there are school rivalries that continually work against student cooperation. At regional and national levels when students gather, these patterns of conflict re-emerge to obstruct organization into effective federations or movements that represent the students interests and needs.