The focus of this research is to investigate how violent conflicts have been occurring in the Democratic Republic of Congo (DRC) for decades while democracy is linked to peace, also to identify the root of cause of the conflict. Eventually, through the assessment over the relationship between democracy and peace, conflict was supposed to come to end. Instead, peace in the DRC has been elusive and seldom due to political and economic reasons. The unsolved conflicts are threatening international peace because of the interrelation of domestic politics and foreign affairs which is the global politics. From the neo-liberalism perspective, it has been asssumed that an international system, Internationalism is associated with democratic peace impacting on national policies and intenational business. Hence, the unsettled conflicts in the country affect also the international peace. From internationalism systemic approach based on three principles of perpetual peace, Kant states that democratic states do not go to war because of economic ties and interdependence system.