Fear as an evolutionary force
And so, yes, fear is more than a physiological response to danger, it is an evolutionary driving force, present in greater form in some than in others. We are all called to different paths and to learn in different ways. Astrology demonstrates that quite clearly.
Understanding and meaning can assuage fear and both are acquired through knowledge and curiosity is no more than a yearning and search for knowledge, whatever the impetus may be.
We are born fearing the unknown to some degree. When we make known we come to understand and we lose fear, or we gain a belief that we have a measure of control. We can only manage fear of the unknown by removing the uncertainty and making known that which we fear.
That is why if we are in the dark and fearful, when we turn on the light, in an instant we become less fearful because we can see, identify, know in ways the darkness would not allow.