This made me think of Seth Godin’s book "Linchpin: Are You Indespensible?" where he comments in depth on our "lizard brain."

"A squirrel runs around looking for nuts, hiding from foxes, listening for predators, and watching for other squirrels. The squirrel does this because that's all it can do. All the squirrel has is a lizard brain." - Seth Godin

This concept always stuck with me, explaining the fight or flight syndrome and for me the Imposter Syndrome I can struggle with.