Philosophy
The Ethics of Genetic Enhancement and Human Nature
Quick fact
The first gene-edited babies were created in 2018, and they were intended to be HIV-resistant—not enhanced, but the science is now possible for editing traits like intelligence or muscle mass in embryos.
Why this is interesting
Imagine a future where parents can choose their child's intelligence or height. Is that just another way to give your child a head start, or does it cross a fundamental line?
Read the full explanation
Understanding The Ethics of Genetic Enhancement and Human Nature
To understand the ethics, think of two kinds of genetic interventions: therapy and enhancement. Therapy fixes a disease, like correcting a mutation that causes cystic fibrosis. Enhancement aims to improve characteristics beyond typical functioning, like boosting memory or height. At first, the line seems clear, but it blurs—for example, is increasing height in a child with dwarfism therapy or enhancement? Most ethical debate centers on enhancement because it raises questions about whether we should alter 'normal' human traits. People often feel uneasy because it seems like 'playing God' or 'tampering with nature.' But others argue that using medicine to improve ourselves is what we already do with vaccines or glasses. The concern is that enhancing embryos means making decisions for someone who can't consent, and those changes will affect their entire life and their children. The core question is: what is acceptable to change, and who decides?
A deeper explanation
The ethical debate hinges on two opposing views: liberal eugenics and bioconservatism. Proponents of liberal eugenics, like philosopher Julian Savulescu, argue that if enhancements are safe and available, parents have a moral obligation to choose the best for their children, as long as they do not restrict their future autonomy. They see enhancement as an extension of parental care. Bioconservatives, like Francis Fukuyama, worry that genetic enhancements will undermine human dignity by reducing people to objects of design and threatening the concept of 'human nature.' They argue that a shared human nature is essential for moral equality—if we alter it, we risk creating a new species or a race of 'posthumans.' There are also social justice concerns: if enhancements are expensive, they could widen inequality, creating a 'genetic divide.' The technique most often discussed is CRISPR-Cas9, which allows precise edits to DNA. When used on embryos, changes are heritable, meaning they pass to future generations. This raises informed consent issues, as the embryo cannot agree, and the long-term effects are unknown. Ultimately, genetic enhancement forces us to decide what we value about being human and how far we should go in using technology to shape our own evolution.