Philosopheasy Editorial Ledger
Curated and annotated by the Philosopheasy Editorial Board as part of the series on Ideas Surviving Outside the Algorithmic Consensus. [Estimated reading time: 7 mins]
When forced to choose between the total sum of human joy and the average quality of our lives, moral philosophy splits down a terrifying fault line. Do we want a crowded universe of mediocre satisfaction, or a sparse cosmos of exquisite brilliance? This tension between total and average utility is the central battleground of population ethics.
The Core Divergence
The debate hinges on how we value additional lives. Total utilitarianism treats every positive life as an asset, regardless of how low its quality is, as long as it remains above the threshold of non-existence. Average utilitarianism, conversely, treats any life that falls below the current average as a liability—even if that life is highly happy and deeply worth living. This mathematical divergence leads both theories into bizarre, counter-intuitive conclusions.
This dilemma is not merely academic; it is the silent engine of modern policy. Do we optimize our economies for total GDP growth, adding millions of low-wage jobs to boost the aggregate ledger, or do we optimize for GDP per capita, even if it means restricting entry to our prosperous societies? We are constantly balancing the total against the average.
| Feature | Total Utilitarianism | Average Utilitarianism |
|---|---|---|
| Primary Metric | Sum of all individual well-being | Mean well-being per individual |
| Population Preference | Favors larger populations with lower quality | Favors smaller populations with higher quality |
| Core Paradox | The Repugnant Conclusion | The Sadistic Conclusion |
| Treatment of New Lives | Always positive if life is worth living | Negative if below the current average |
The Unacceptable Alternatives
While average utilitarianism successfully avoids the Repugnant Conclusion, it falls victim to the Sadistic Conclusion. If we must choose between adding a group of people with lives of high but below-average quality, or adding a single person whose life is filled with torture and misery, average utilitarianism can favor the latter. Why? Because adding a single miserable person might lower the average less than adding a large group of moderately happy people. This trade-off demonstrates that neither theory can align perfectly with human moral intuition.
Textual Citations & Original Sources
- Derek Parfit, Reasons and Persons, Chapter 18: "The Average Principle" (1984). Comparative critique of average versus total moral aggregation.
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