Thompson's "A Defense of Abortion": Key Arguments Analyzed
This paper analyzes Judith Jarvis Thomson's landmark philosophical essay "A Defense of Abortion," published two years before the Supreme Court's Roe v. Wade decision. The analysis examines Thomson's use of analogies, descriptive and value assumptions, and Socratic argumentation to challenge pro-life premises. Key arguments discussed include the acorn analogy questioning when life begins, the moral dilemma of a pregnant woman's life versus the fetus's right to life, and the open-window analogy addressing bodily autonomy in cases of rape. The paper evaluates how Thomson systematically dismantles anti-abortion positions while advancing a compelling pro-choice framework.
- Introduction: Overview of Thomson's rhetorical approach and historical context
- Is the Fetus a Human Being from the Time of Conception?: Acorn analogy challenges premise that life begins at conception
- Does a Woman Have a Right to Abort a Fetus to Save Her Own Life?: Emotional and logical case for abortion when mother's life is at risk
- The Right to Life and Bodily Autonomy: Henry Fonda and open-window analogies challenge fetal right to life
- Conclusion: Summary of Thomson's analogies and pro-choice contributions
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What makes this paper effective
- The paper traces Thomson's argument in a logical sequence, connecting each analogy to the broader philosophical claim it supports, which helps readers follow a complex ethical debate.
- It identifies specific rhetorical and argumentative techniques — such as descriptive assumptions, value assumptions, and Socratic questioning — and applies those labels consistently throughout the analysis.
- Direct quotations from Thomson are used purposefully to anchor analysis rather than substitute for it, keeping the critique grounded in the source text.
Key academic technique demonstrated
The paper demonstrates textual analysis of a philosophical argument by unpacking how Thomson constructs her case through analogy and assumption rather than simply restating her conclusions. The writer identifies the logical structure behind each analogy — acorn/oak tree, Henry Fonda, open window/burglar — and explains why each one challenges a specific anti-abortion premise, modeling how to evaluate argumentation rather than just summarize it.
Structure breakdown
The paper follows the organizational structure of Thomson's original essay, moving from the question of fetal personhood to the competing right-to-life claims to the rape scenario. Each section introduces the anti-abortion premise, presents Thomson's counter-argument, and briefly evaluates its effectiveness. A short conclusion synthesizes the key analogies and affirms Thomson's contribution to the pro-choice debate. This mirrors-the-source structure is a common approach in close reading or book-response assignments.
Introduction
The author of this piece, Judith Jarvis Thomson, supports abortion. She uses descriptive assumptions creatively and makes dramatic — even outrageous — examples as juxtapositions to develop her argument and make her points. She also employs value assumptions that are effective in her narrative. But Thomson's theses and her Socratic style of argument carry the most weight as she turns the positions of the pro-life movement upside down as a way to make her own positions shine. Thomson presents all of this two years before the U.S. Supreme Court's historic Roe v. Wade decision, which is impressive in hindsight given the intensity of the ongoing debate on abortion.
Works Cited
Thomson, Judith Jarvis. "A Defense of Abortion." Philosophy & Public Affairs, vol. 1, no. 1.
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