Objective: The terrorist attacks of September 9/11 ensued war on terror, which had world-wide implications. Being a front-line state in this war, Pakistan faced several human security challenges and risks on social, economic, and psychological grounds. This article critically analyses the impact of war on terror, which jeopardized lives of common people and aggravated militancy and extremism in the country. Method: This is a qualitative case study research that tries to establish an in-depth understanding of the social phenomenon of war on terror and its consequences on the social setup of human life in Pakistan. Findings: The major finding of research reveals that the war on terror caused religious extremism, suicide bombing culture, external intervention, and internal displacement. Recommendations: In order to control terrorism in Pakistan and to mitigate the post-war on terror effects, this research recommends to develop and enhance coordination in the affairs of main functionary bodies of the country like government, security forces, and intelligence agencies.