Individuals conceive their attitudes with regard to objects or persons as relatively common and ordinary. This well-known phenomenon is stable, general and produces for judgements a False Consensus effect. This paper is a review of the False Consensus literature and reports the underlying mechanisms of this phenomenom. Four general theoretical perspectives are examined : (a) logical information processing (attributive hypothesis), (b) selective exposure and cognitive availability (cognitive hypotheses), (c) salience and focus of attention (selective information treatment hypotheses), and (d) motivational processes. Within the context of this work we report the social properties of consensus judgment and stress that these judgments depend on the social conditions in which they takes place (social regulation hypothesis of judgment) . More precisely, the aim of this review is to show that the social consensus perception and its underlying mechanisms, depend on individuals personal histories that are connected to social context in which they are involved.