What is a major concern that leads to international cooperation against terrorism?

A major concern that drives international cooperation against terrorism is the presence of weak legal frameworks across different countries. This issue arises because ineffective legal systems may hinder the ability of nations to adequately prevent, investigate, and prosecute terrorist activities. When legal frameworks are weak, it can lead to gaps that terrorists exploit, allowing them to operate more freely across borders.

International cooperation becomes essential as countries recognize that terrorism is a global threat that cannot be effectively addressed by a single nation acting alone. By collaborating, countries can share intelligence, harmonize legal definitions and procedures, and strengthen their collective legal capacity to combat terrorism. This collaboration helps to create a more coordinated and effective response to the challenges posed by terrorist networks that do not adhere to national boundaries.

The other concerns, such as transnational recruitment, domestic policy failures, and perceptions of civil liberties threats, are indeed important factors but they do not directly underscore the necessity for a unified global response rooted in legal frameworks as prominently as the weaknesses in legal systems do.