The document discusses the history and development of gene editing technology, including how CRISPR/Cas9 has allowed for quick and efficient genetic modification in human cells and animal models. While gene editing holds promise for understanding disease and potentially treating genetic conditions, its use in human embryos particularly with CRISPR/Cas9 raises significant ethical concerns about human germline modification and eugenics. The document argues that prominent scientists have rightly begun discussions around the ethical implications of modifying the human genome.