This paper explores how smart cities can serve as instruments of peace by protecting human and religious rights, fostering social cohesion, and promoting inclusive governance. It synthesizes legal norms, empirical research, and ethical considerations to examine how urban planning and technology shape contemporary urban life. Particular attention is given to the protection of religious freedoms as a core human right in urban settings and to how governance models can mitigate conflict while advancing social inclusion. Case studies and scholarly insights are integrated to illustrate how cities can balance law, technology, ethics, and diverse beliefs to build resilient and peaceful societies.