2026. A COMPREHENSIVE STUDY OF AGENTIC AI SYSTEMS: EXPLORING THE EVOLUTION FROM PREDICTIVE MACHINE LEARNING MODELS TO AUTONOMOUS, GOAL-DIRECTED, AND DECISION-MAKING ARTIFICIAL AGENTS IN COMPLEX ENVIRONMENTS. Journal of Integrative Science and Societal Impact. 2, 1 (Mar. 2026), 91–100. DOI:https://doi.org/10.29121/JISSI.v2.i1.2026.37.