Evaluate the promise and the ethical limits of genetic engineering and biotechnology in medicine, food and human enhancement

What this dot point is asking

This theme gives you balanced material for General Paper questions on genetic engineering and biotechnology: gene editing in medicine, genetically modified food, and the prospect of human enhancement. The central insight is that the question is almost never "should we use this technology at all" but "where should we draw the line", because the same tools that cure disease can also raise serious ethical concerns. A strong answer separates the clear benefits from the contested uses, handles the "playing God" objection fairly, and argues for principled limits.

The answer

The promise

Biotechnology offers benefits that an essay should state precisely:

• Curing disease. Gene therapy and tools such as CRISPR offer the prospect of treating or curing inherited disorders at their genetic root.
• Food security. Genetically modified crops can raise yields and add drought resistance, pest resistance and nutrition, helping feed a growing population on limited land.
• Industrial and medical production. Engineered organisms produce medicines, including insulin, and sustainable industrial inputs.

The ethical limits

Against the promise sit real concerns:

• Safety and unintended consequences. Edits can have unforeseen effects, and some are irreversible, especially heritable ones.
• Therapy versus enhancement. Curing disease is widely accepted; designing desirable traits (intelligence, appearance) is far more contested.
• Equity. If enhancement is available only to the wealthy, it could entrench a new biological inequality.
• Consent. Heritable edits affect future generations who cannot consent.
• Ecology. Engineered organisms released into ecosystems carry biodiversity risks.

The therapy-enhancement line

The single most useful distinction in this theme is between therapy (restoring normal function, curing disease) and enhancement (improving traits beyond the normal). Most ethical frameworks accept therapy more readily than enhancement, because therapy relieves suffering while enhancement raises questions of fairness, consent and what we value in being human. Drawing answers around this line lets you support beneficial uses while opposing troubling ones, the essence of a balanced judgement.

The "playing God" objection

Questions in this theme often invoke the idea that we should not "play God" or interfere with nature. Handle it fairly: it expresses a genuine caution about hubris, humility and irreversibility, which deserves respect. But it proves too much if taken literally, since medicine, agriculture and vaccination already "interfere with nature" to great benefit. The mature position treats it not as a veto but as a reason for caution and limits, especially where consequences are irreversible.

Examples in context

Example 1. Gene editing for inherited disease. The use of gene-editing tools to treat conditions such as sickle-cell disease, by correcting the genetic fault in a patient's own cells, exemplifies the therapy end of the spectrum: a clear medical benefit, relieving real suffering, with risks that can be assessed and managed in a regulated clinical setting. It is the strongest evidence for supporting beneficial uses, and contrasts sharply with the far more contested prospect of editing embryos to enhance traits, illustrating exactly where the ethical line falls.

Example 2. Singapore's food security and novel foods. Importing most of its food and pursuing a goal to produce a substantial share of its nutritional needs locally, Singapore has supported biotechnology including cultivated and novel foods and was an early approver of cultured meat. This shows how a land-scarce society weighs biotechnology's promise against caution: the tools are embraced where they address a genuine national need and are carefully regulated, evidencing the conditional, governance-focused judgement a balanced essay should reach.

Try this

Q1. Explain the difference between gene therapy and genetic enhancement. [2 marks]

• Cue. Therapy restores normal function or cures disease (correcting a faulty gene), while enhancement improves traits beyond the normal (such as intelligence or appearance), which raises sharper questions of fairness and consent.

Q2. Give one reason heritable genetic edits raise a consent problem. [2 marks]

• Cue. They alter the genome of future generations who cannot consent to the change, and any unforeseen harmful effects would be passed on irreversibly.

Q3. Explain why the "playing God" objection is not a complete answer to genetic engineering. [3 marks]

• Cue. It rightly warns against hubris and irreversibility, but proves too much if taken literally, because medicine, agriculture and vaccination already intervene in nature to great benefit, so it works as a reason for caution and limits rather than as a blanket veto.