International audienceIf, to speak about organization, we accept the postulate that there are " good reasons " to speak about it, it is then necessary to investigate the universe of ideology and the way by which models plunge their roots in ideology as well as they create a coherent world. Ideology, as justification, produces representations. What is in question here, is the kind of deformation carried by representations. They produce a structure of the world, the validation of which may be an object of science seen as the construction of a truth in a project of "knowledge" of this world. The concept of ideology is particularly difficult. It benefits and suffers from two major influences in its foundations: that of a political perspective w...