This is where civic duty comes in . If you know you have certain genes or traits which would hinder the social , emotional , physical development of a child , then you should not have kids . I have an aunt who has cancer and they decided not to have kids j . i . c . I have depression and am leaning towards no kids . Of course , this won ' t account for a lot of minor physical things like poor vision or early balding . I think it would be exciting and also potentially very , very dangerous if humans gained the ability to alter genes or select traits in vitro . One of those great power , great responsibility dealios . Hmm , also I suppose the people who don ' t give a crap about civic duty are people we need less of , so the whole idea of civic duty is useless since you can ' t enforce morals . Who knows ?