Phobias of heights, storms, snakes, and spiders are much more common than phobias of cars, stairs, stoves, or sharp objects. According to psychologist Martin Seligman, the reason is that:

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Phobias are believed to be evolutionary in nature, as humans are more likely to develop a fear response to objects or situations that posed a threat to our survival in the past. Height, storms, snakes, and spiders, for example, have all been potentially dangerous in the course of human evolution, while cars, stairs, stoves, or sharp objects have not.

Phobias of Heights, Storms, Snakes, and Spiders Are Much More