On the other hand, Dick Marty explained the difference of approach concerning terrorism between the EU and the US as following: While the states of the Old World have dealt with these threats primarily by means of existing institutions and legal systems, the United States appears to have made a fundamentally different choice: considering that neither conventional judicial instruments nor those established under the framework of the laws of war could effectively counter the new forms of international terrorism, it decided to develop new legal concepts.
另一方面，Dick Marty說明歐盟和美國對付恐怖主義的分別如下： 舊世界的國家主要用既有的機構與法律系統對抗這些威脅，相對地美國似乎作出根本上不同的選擇：考慮到常規的司法文書（conventional judicial instruments）和按照戰爭法綱領（the framework of the laws of war）設立的司法文書，都不能有效對付新型國際恐怖主義，它決定發展新的法律概念。