Nicolai Hartmann and ontology: The knowledge and the knowledge metaphysics underlight ontology

The being problem is a matter that many thinkers consider and inspect. All of the thinkers who constitute an idea about the being are affected by the formers' ideas. N. Hartmann who is aware of the fact that those ideas has one point of view has been affected by Husserl's ideas. N. Hartmann had written "Knowledge Metaphysics" affecting by Brantano's metaphysics. With his argument, he is opposite to Logical-Idealism of Marburg School while he takes side of Aristotheles. At the same time, he is opposite to Heidegger, i.e. Existansialisme, and S. Kierkgaard. Hartmann is accepted the founder of neo-ontology because he assumes that there is an ontological structure in fundamentals of whole philosophical ideas. All of thinkers support either subjective-idealism or objective- idealism. At this point it can be said that N. Hartmann being enlightened by subjective- idealism, he arrived objective-idealism. In precious sections, it has been tried to lighten this situation and bring up his progress in the philosophy history.