The present research aims at analyzing the possibility of a world peace in reference to a cosmopolitical project. In the current era of globalization, events are accelerating and spreading easily over the planetary space. In this case, peace is no longer to be sought only at the local or national level as advocated by Kant, but it is also to be thought of at the international level. Thus, cosmopolitanism is imposed in order to facilitate a policy where the members of a state are not isolated but create a rapprochement with other states in view of exchanges. However, this process is limited by the domination of a category of nations ready to impose their beliefs and interests on less advanced nations.At present the event affecting the whole world is the war in Ukraine. In this work we find established analyses of the causes of such a war and some solutions to get out of it.