This thesis investigates global fight against terrorism in North West Pakistan and Afghanistan from a 21st century perspective in 2018. It focuses on local attitudes towards the War on Terror and their interplay with geo-strategic, regional, international and Pakistan’s domestic landscapes. In doing so, it questions the efficacy of existing academic and policy approaches towards achieving sustainable peace in North West Pakistan in particular and South Asia in general. It also evaluates the impact of regional rivalries especially in between Pakistan and India on the achievement of US foreign policy interests. Part-1 reviews existing literature on terrorism especially in post 9/11 setting. It examines the international discord of agreeing on a single definition of terrorism and its ramifications. It sequentially focuses on character of security in North West Pakistan and neighbouring Afghanistan since colonial times. It also identifies various traditional, religious and societal angles of Pashtun tribes; which always inspired them to fight against external powers. Part-2 combines academic investigations with empirical evidence. The results are correlated with current discussions on modern terrorism, geopolitical pulls and regional rivalries to create a holistic picture. It identifies local attitudes and regional rivalries as major impediments towards achievement of sustainable peace. Research findings indicated that predominant Western academic debates on the conflict were foreign policy inspired with little local and veteran input. By adapting a pragmatic approach the terrorism challenge can be addressed and the region can contribute towards the continuation of ‘Rules Based Order’ within the current phase of Great Power Rivalry.