In the thread https://www.physicsforums.com/threads/first-human-embryos-edited-in-u-s.921238/the film Gattaca was discussed as an example of a very bad society brought about by the use of human genetic manipulation. In my opinion the Gattaca society is a very poor example of this in that is is not nearly as bad as the society in we currently live. The potentially bad result from the manipulation in Gattaca is the reduction in genetic diversity which reduces the adaptability of the species to environmental changes. Wikipedia has a good article close to this topic. https://en.wikipedia.org/wiki/Genetic_engineering_in_science_fiction My own personal SF favorites of really bad consequences of human genetic manipulation are the following. Beggars in Spain by Nancy Kress Oryx and Crake by Margaret Atwood Brave New World by Aldus Huxley What do you all think about this?