A fear of heights will keep you from getting close enough to the edge of a cliff to fall off and die. Fear of spiders and snakes will keep you from approaching one that may be venomous and lethal. Fear of the dark will make you more aware of your surroundings so you would be more likely to spot a potential predator. Fear of deep water could stop you from falling in and drowning. And so on. Fears tend to have a function.
I have many irrational fears myself (like sheep and moths/butterflies) so I'm well aware that they do exist, but your everyday fears are generally rational ones.
I have many irrational fears myself (like sheep and moths/butterflies) so I'm well aware that they do exist, but your everyday fears are generally rational ones.
