This chapter aims to situate the explanation of the phenomenon of anxiety within a phylogenetic-biological and cultural-historical context. Drawing on several theories of evolution and cultural development, the systematic tripartition into affective fear, felt anxieties, and mental anxiety is substantiated. Human evolution results from complex processes in which thinking, language, social behavior, culture, practical activities, and concrete experiences interact with one another, continuously driving development forward. As imagination increases, the spectrum of anxieties also expands. With the capacity for more abstract thinking, an awareness of potential dangers and risks emerges, enabling reflexive engagement with oneself as a being subject to anxiety, while also making it possible to deliberately manage these anxieties.