Anxiety is a crippling neuropsychiatric condition that encompasses a complex endophenotypic network of genetic, immunological, epigenetic, and metabolic mechanisms, interacting with the environment. A new approach to complex biological systems, including mental states and their neurological correlates, is diaeventology, a paradigm that exposes the event ontologies of these biomolecular/cellular mechanisms. General anxiety disorder has been studied in subclinical and clinical research settings where evidence is obtained for a longitudinal patterning of chronic and episodic and often increasingly stressful life events that provide the etiology and development of the pathology. Early events that involve brain oxygen deprivation coupled with carbon dioxide abundance are linked to biochemical and epigenetic processes associated with anxiety instantiation. A verified analysis of the current evidence suggests a neuroimmune mechanism that aligns with stress pathophysiology and epigenetic re-tailoring of key genomic loci that inappropriately compensate and misdirect biological defense mechanisms toward central nervous system dysfunction presenting as anxiety disorders.