In the history of artificial intelligence, 2026 will be remembered as the year of the “Agentic Turn.” We have moved beyond the era of static Large Language Models (LLMs) that merely predict text, into an era of autonomous entities that plan, reason, and execute. At the heart of this transition lies the Rational Agent framework—a concept pioneered by Stuart Russell and Peter Norvig. By applying the rigorous standards of utility and rationality to modern agentic workflows, we can build systems that are not only powerful but also provably aligned with human intentions.

The Resurrection of the Agent

In the seminal text Artificial Intelligence: A Modern Approach (AIMA), a Rational Agent is defined as an entity that perceives its environment and acts so as to maximize its expected utility. For decades, this was a theoretical ideal. However, in 2026, the rise of “Agentic AI”—systems capable of using tools, navigating digital … Read the rest