Quandons we speak in reflections concerning the society and its construction to break dasrelaes of classrooms cannot deny the enormous contribution of the theories of Marx eFoucault. To weigh of the two philosophers to create teoriasreflexivas theories and on the perpetual fight between antagonistic classrooms for the power, them doistinham different vises on the evolutions of the society from this relaoconflituosa. Marxvia the power as one forms refusal, for which the bourgeoisie if used to oppress, to explore and to get profits on the proletariat (laborers and peasants). Negative Comoforma all progress was sent for the comfort and doenriquecimento of the bourgeoisie. Nacontramo de Marx, Foucault goes to enxergar in the power the positive force that acts nasociedade as combustible propellant of the progress and the scientific advance, nocaso of the social medicine, was only possible thanks to the fear of the bourgeoisie of serflertada by males deriving of the poor classrooms, had created politics of prevenoda illness and control of the body that works, to prevent revolts to semanterem in the power. Sejaqual will be the vision that if has on the power must to be taken in consideration asevidencias politics and of capital, evaluated for eculturais historical dimensions. with this the power never will be able to leave to exert predog on asociedade, whichever the classroom that is in the power.