This article examines the escalating threat of AI-generated deepfakes and synthetic media to global information ecosystems, democratic processes, and financial stability. The article traces the technical evolution of deepfake technologies from early experimental models to widely accessible creation tools, analyzing their amplification through algorithmic systems and exploitation of human cognitive vulnerabilities. Through a comprehensive threat analysis framework, the article identifies critical technological and social vulnerabilities while assessing specific risks to democratic institutions, media ecosystems, and public trust. The article presents a multilayered response strategy integrating blockchain authentication systems, neural network detection algorithms, international regulatory frameworks, and targeted media literacy initiatives. The article evaluates emerging countermeasure technologies, including cryptographic content verification, metadata analysis approaches, and real-time detection systems, while proposing governance structures capable of cross-border enforcement. Looking toward future developments, the article explores self-regulating AI systems with built-in verification mechanisms and cross-disciplinary intervention models that bridge technical, social, and regulatory domains. This integrated approach offers a sustainable framework for preserving information integrity against increasingly sophisticated synthetic media challenges.