The One-Person Billion-Dollar Company analyzes how agentic artificial intelligence, cognitive automation, and distributed digital infrastructures are radically transforming the very concept of enterprise. In a context where productivity is no longer a function of human labor, a new entrepreneurial profile emerges: one that designs intelligent systems instead of hierarchical structures.The book offers a theoretical analysis of the new economies of scale enabled by autonomous agents, modular APIs, advanced language models, and composable cloud services. These infrastructures make possible a company entirely built on automated cognitive systems capable of operating and adapting with minimal human intervention.It provides a conceptual framework for understanding how twenty-first-century enterprises are being born: not based on large workforces, but on intelligent architectures designed to generate value autonomously. In this scenario, the historical assumptions about scale, growth, and productivity are overturned, paving the way for leaner, fully systemic forms of enterprise-potentially run by a single individual.