Ethics, Genetics, Creativity

One of the things "Generosity" continually makes me think about is how genetics and ethics are becoming so interwoven.  For instance, if a method for introducing a happiness gene (or any kind of gene, really) in to a person was discovered, should every newborn just have that gene?  It's a difficult question, as technology fast approaches the point where we could, theoretically, design our children with traits that were more desirable.  I get the sense that there is something wrong Thassadit.  She has had such a traumatic life, but still maintains that preternatural happiness.  But is that even really happiness?  Without an intimate knowledge of unhappiness, there is no sense of genuine happiness.