The theory of evolution and preparedness can help explain biologically why people have phobias.
To help you better understand this theory imagine this scenario: There are two animals living in a forest.
Science has attempted to understand two things in regards to phobias; which mechanisms activate a phobic response and how they can be treated.
Initial scientific evidence has explained the origin of phobias in terms of Pavlovian classical conditioning, identifying them as conditioned human responses (Marks, 1989).
Suffering from a phobia can be a debilitating and distressing condition.