As with any good Romantic, Mary Shelley wants to uncover the dark, irrational forces that lurk deep within the human soul. Frankenstein's monster is a reminder that not everything about us is rational. Reason may be what separates us from the animals, but it doesn't tell us the whole story about who and what we are.
The Monster alerts us to the uncomfortable fact that neither ourselves, nor the complex societies which we form, are wholly rational. We are all of us motivated by hidden impulses and drives which we must somehow learn to suppress if we're to maintain anything like a civilized, fully-functioning society. Though some of the Monster's actions may be thoroughly abominable, he's still recognizably human all the same. It's just that, unlike most of us, he hasn't learned how to control his subconscious drives.
As well as being created by Dr. Frankenstein, the Monster is also very much a creature of society. For it is society that has...
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