Human cognition is scaffolded by ancestral archetypes—deeply imprinted, evolutionarily conserved patterns of perception, emotion, and behavior that have been established across generations. These innate structures serve as motivational templates that filter experience and shape identity long before conscious reflection begins. Targeted violence, an escalating public safety threat, is often marked by archetypal amplification, as seen in many school shootings, assassinations, and terrorist acts. This article presents the ARCH triad—a heuristic framework comprising extreme overvalued beliefs, imprinted archetypes, and thymotic drive—to explore the psychobiological roots of some acts of targeted violence. We examine how these components interact across neurodevelopmental, ethological, and cultural levels, and demonstrate their relevance through brief case analyses of several attackers. Implications for behavioral threat assessment, particularly within the Terrorist Radicalization Assessment Protocol–18 framework, are explored. We also identify potential neuroethological markers—such as symbolic releasers, fixed archetypal action patterns, and last-resort cognition—that may inform future artificial intelligence-driven tools for early intervention and forensic risk formulation. While not predictive, the ARCH model provides an additional lens for interpreting symbolic and motivational dynamics in targeted violent behavior.

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