This book offers a visionary and interdisciplinary framework for rethinking mobile communication networks through the lens of complex systems. It combines theoretical rigor with real-world relevance, integrating network science, bio-inspired computation and modeling approach, and social behavior to model and design future-proof infrastructures. The innovative approach lies in merging multilayer and higher-order topologies with artificial intelligence and behavioral dynamics, enabling systems that are adaptive, resilient, and socially aware. The book emphasizes the mutual feedback between technological design and human interactions. It addresses researchers, engineers, and policymakers engaged in 6G, digital health, smart cities, and sustainability, offering practical insights into designing intelligent, human-centric, and ethically aligned networks for a hyperconnected future.