sentences:  The related term "horizontals" arose during the anti-globalisation European Social Forum in London in 2004 to describe people organising in a style where they "aspire to an open relationship between participants, whose deliberative encounters (rather than representative status) form the basis of any decisions," in contrast to "verticals" who "assume the existence and legitimacy of representative structures, in which bargaining power is accrued on the basis of an electoral mandate (or any other means of selection to which the members of an organisation assent)".Horizontalidad is related to the theories of communist anarchism, social ecology and libertarian municipalism, autonomist Marxism and participatory economics.According to these schools of thought, horizontality seems to be a necessary factor for real freedom because it allows personal autonomy within a framework of social equality.