The chapter presents a systematic analysis of Yugoslav/Serbian spatial and urban planning evolution from 1945 to 2015, employing planning communication in policy formulation as a critical analytical lens. The depth and quality of communication—conceptualised as interactions across policy levels, sectors (public/civil/private), and disciplines (policy domains)—is established as a fundamental determinant of resilient planning. Through historical analysis, the chapter identifies four distinct phases: growth (1945–1974), characterised by post-WWII reconstruction and state-driven development; conservation (1974–1989), reflecting institutional consolidation following constitutional reforms; destruction (1989–2000), encompassing Yugoslavia’s dissolution and subsequent socio-political fragmentation; and reorganisation (2000–2015), spanning democratic transition, economic upheaval and subsequent authoritarian tendencies. Each phase is examined through a tripartite analytical framework addressing systemic factors (contextual specificities shaping institutional and regulatory frameworks), networking capacity (horizontal actor cooperation), and professional dynamics (interdisciplinary engagement). This longitudinal analysis reveals how complex interactions between political ideologies, economic transformations, and societal changes shaped planning approaches. The chapter thus provides a comprehensive basis that facilitates critical insights into the evolutionary resilience of Serbian spatial and urban planning during multiple historical phases, which will be elaborated upon in the subsequent chapters.