Through an analysis of The 1844Manuscript of Economics and Philosophy , we discover that the ontology of Marx is not a theory about Sein , but about Dasein.It is only when Marx makes critiques on other ontologies that Sein becomes the object.For Marx , Dasein is ' sensible human activity ,' namely ' objective activity ' or ' revolutionary ',' practical-critical ' activity , the activity of self-negation.Marx maintained that human beings are negative beings.They always negate themselves , then affirm and define themselves by this incessant negation.The dialectic is the self-becoming process of ...