Assume it were discovered that certain mental aspects of a person - their temperment, their inclinations, their basic attitudes and desires - were at least partly the result of the person's genes. Now assume that a couple (for whatever reason) decides that they want their child to be an energetic, extroverted, optimistic and competitive; or that they decide they want a calm, collected, intelligent, questioning and cooperative child; or any other variation. They then go on to their doctor and have the embryo's genes modified such that their child will have these qualities. Is the control exercised over the child's fundamental nature an imposition of the parents' wills onto the will of the child? And is a person whose will has been designed by another will as free as a will that has not been designed at all?

Excellent question. It is excellent partly because it goes to the heart of the nature of freedom: freedom makes little sense without a context. So, it makes sense to ask of a person at any time whether she or he is free to do X, but in the case you are imagining there is no will of the child prior to the parent's decision making. So, we do not have a case of when, say, a two year old child is given some character-transforming infusion, we are rather focussing in on the very gestation and emergence of the child. I suggest that there might be reasons to discourage this kind of engineering (perhaps such engineering might tend to make parents feel they have a kind of ownership over their children), but that such engineering need not be seen as an imposition of the parents' will "onto the will of the child" with one proviso. That condition concerns whether the child has any freedom once she reaches maturity to be (for example) not optimistic, not competitive, to neglect her intellectual talents, to be non-cooperative and unquestioning and so on. Arguably, one freely does X when one does X and has the power to do otherwise. If the engineering is so thorough that the child cannot act other than she or he has been shaped then it seems that the parents have, as it were, programmed their child and eradicated her freedom, except in the trivial sense that the child will be free to do what she wants. I describe that as trivial in the sense that while she can do what she wants, she is not free to have any other wants than those her parents have selected.

Read another response by Charles Taliaferro
Read another response about Children, Freedom