CRISPR is ethical under certain conditions

Many scientists and ethicists have voiced concern over genetically editing reproductive and germ cells. This is because the CRISPR edits would then be inheritable to the children of the individual who has been treated with CRISPR. Since we do not know the long-term effects of CRISPR, we should not allow the effects of CRISPR to be passed on to the next generation. Even if just one person who had their reproductive cells edited with CRISPR chose to reproduce, the entire human gene pool could be radically changed. That change may not be for the better, so it is unethical to allow CRISPR changes to be inherited.

CRISPR can be used on embryos and on adults. Using CRISPR on embryos will surely have significant impacts on that individual's life and there is no way that we can ask an embryo for consent. Thus, we should only use CRISPR on individuals who can consent.

CRISPR has gained popularity for its potential to cure negative genetic conditions, such as sickle cell anemia and cystic fibrosis. Using CRISPR for these purposes does not pose ethical concerns. On the other hand, CRISPR should not be used for "human enhancement," such as using CRISPR to change a child's physical appearance.