The nature of terrorism has changed due to globalization, weakness of the Arab region and American military presence in that region. On the other hand, the terrorist methods have also changed. Nowadays terrorists for instance use information technology to fund their operations and speed up their mobility. Thus, it is important to consider terrorism as a by-product of historical shifts in international relations. The effects of terrorism include initiating the clash of civilizations and increasing doubts about the democratic and liberal principles of liberty, tolerance individual rights and free dams. In addition to the military approach, there is a democratic response to terrorism. The democratic response considers terrorist attacks as a crime against humanity, calls for multi lateral global fight against terrorism, and promotes cosmopolitanism as the basis of global fight against terrorism. In conclusion, a democratic cosmopolitan approach allows us to develop tough measures against terrorism.