I reviewed substantial portions of
Decline and Fall of All Evil by [Seymour Lessans' book on PhilArchive] (
https://philarchive.org/archive/LESDAF?utm_source=chatgpt.com), especially the introduction and the opening chapters where the central argument is laid out. The book is only 74 pages long, but a fully rigorous contradiction hunt would require line-by-line analysis. Based on the text, here is my assessment.
1. Major contradictions (0–3)
I did
not find a clear, formal contradiction in the sense of the author explicitly asserting both
P and
not-P.
However, one possible tension is:
1. "Not a theory" vs. highly speculative future predictions
- Lessans repeatedly insists that his conclusions are not a theory but an "undeniable equation," "scientific discovery," and "mathematical fact."
- Yet he also makes sweeping predictions such as the elimination of war, crime, adultery, divorce, and essentially all evil once his discovery is understood.
- This is not a logical contradiction, but it creates tension because the predictive claims go far beyond anything demonstrated in the text itself.
I would therefore say:
Major contradictions found: 0.
2. Major incoherencies (0–3)
Here I think there are stronger concerns.
1. The meaning of "mathematical" is unclear
Lessans repeatedly describes his reasoning as "mathematical," "scientific," and "undeniable," but he also explicitly says that by these terms he simply means undeniable truth rather than mathematics in the conventional sense.
As a result, the reader is often told that a proof exists without being given a formal proof in the mathematical or scientific sense. The argument shifts between:
- mathematics,
- logic,
- common sense,
- psychology,
- philosophy,
- and social prediction.
The standards of evidence become difficult to identify.
2. The causal mechanism is underdeveloped
The central thesis appears to be:
- free will is an illusion,
- blame and punishment rest on a false assumption,
- understanding this fact will transform human relations,
- therefore evil will disappear.
The jump from the first point to the last point is enormous. Even if determinism were true, it is not obvious why that alone would eliminate conflict, jealousy, violence, or competition. The book often treats this transition as self-evident when it is precisely the point requiring the most explanation.
3. "Everyone will agree once they understand"
Lessans frequently suggests that any disagreement ultimately results from misunderstanding and that proper understanding will compel agreement.
This creates a methodological problem:
- agreement is treated as evidence of understanding,
- disagreement is treated as evidence of misunderstanding.
That makes the theory difficult to evaluate critically because genuine informed disagreement is largely ruled out in advance.
3. Major inconsistencies with science (0–3)
1. The claim that all evil can be eliminated through acceptance of determinism
This is not supported by contemporary psychology, neuroscience, sociology, criminology, or political science.
Many researchers accept some form of strong causal influence on behavior, and some accept determinism, yet none of the relevant sciences conclude that recognizing determinism would eliminate war, crime, or interpersonal conflict. The prediction is therefore inconsistent with current scientific understanding.
2. Claiming scientific certainty without empirical testing
Lessans repeatedly presents his conclusions as established scientific fact.
Modern science generally requires:
- testable hypotheses,
- empirical evidence,
- replication,
- predictive validation.
The book largely proceeds through conceptual reasoning rather than empirical demonstration. That does not make it false, but it does make the claim of scientific certainty inconsistent with normal scientific standards.
3. The treatment of complex social phenomena as having a single root cause
The book tends to explain war, crime, punishment, moral systems, and social conflict through one fundamental error: belief in free will.
Current scientific models of human behavior generally view these phenomena as multi-causal, involving biology, cognition, culture, economics, institutions, and historical contingencies. The reduction to a single explanatory factor is difficult to reconcile with mainstream scientific understanding.
Bottom line
If I had to summarize:
<Table not included by Don2>
So my overall judgment is that the book's weakest points are
not internal contradiction, but rather
coherence of the explanatory mechanism and
the extraordinarily strong scientific claims made without corresponding empirical evidence.