e scientist cannot tell where the fruits of his experiments may fall.
But most importantly, Mary clearly feels that Frankenstein's experiment is doomed to failure because, in a nutshell, men were never intended to make babies.
Frankenstein had created his being with every expectation that his creature would be fertile. In fact, he hoped that as a result of his experiments, "a new species would bless me as its creator and source; many happy and excellent natures would owe their being to me". It is thus not terribly surprising that he agrees to create for the Being a bride; he clearly had this at least in the back of his mind all along. However, after he has the female half-completed, he realizes that a pair of monsters such as he has created would bear others like them (clearly, this is before the development of the science of genetics), and this race might exterminate mankind. Thus, he destroys the incomplete female to prevent this. In the creation of his Monster, Victor Frankenstein got everything wrong; but in preventing it from perpetuating itself, he finally did something right.
Shelley's question was not whether the c
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