If our bodies could do more things, would our lives be better? Genome editing is a rapidly developing technology that can modify human genes. It can cure heritable diseases, but we could even make certain genetic "improvements" to healthy people. Should we change human embryos genetically to achieve such goals? Bringing together a leading molecular biologist and a Christian ethicist this book responds to the need for solid information and helpful orientation for a pressing moral issue. They explain relevant technical issues without the jargon, clarify the most important philosophical and religious arguments and bring empirical insights to the question of what helps us lead meaningful lives.