Kant's justification of the idea perpetual peace

As one of the most important philosophers of Enlightenment Kant, had given great importance to reason. With the confidence to reason he had believed that the Perpatual Peace could happen. He had defended the ethic and historical progress in order this to happen. He had stated that the nature, in fact, supported individuals in this direction. He had assumed that this ideal would have come true in process due to states as being ethical entities. In the idea of international relations, individuals had been seen as a primary complimentary principle of politics as a moral principle similarly to states. Therefore he had accepted a cosmopolitan approach. By considering the increase of the republican governments Kant had defended the idea of federations constituted of such countries. He had refered to the importance of federation for Perpetual Peace. This study is to show the aspects of the ideas of the philosopher that have been actualized in time. However, it also expresses that hoping to build peace globally would be a quite optimistic idea. It justifies that the world united on Perpetual Peace entirely would be a remote possibility under the present day conditions. Key Words: Enlightenment, Perpetual Piece, Republic, Ethic, Federation.