Persuasion can itself be a cause
if it prevents anything it prevents persuasion.
The boiling oil example establishes a limited point: explaining conduct causally does not by itself prohibit brutal attempts to change it. But the further claim that determinism disables persuasion faces a reply from within the tradition Chesterton attacks. Hume treats rewards and punishments as motives whose reliable influence on conduct exemplifies necessity (Enquiry concerning Human Understanding, first published 1748; inspected in Hume Texts Online’s electronic text, VIII.28). This supports Chesterton’s claim that necessity can coexist with punishment, without establishing that cruelty is justified. Hume, VIII.28.
Mill makes the missing distinction explicit. In A System of Logic (first published 1843; inspected in the seventh edition, 1868), VI.ii.3, causal determination differs from fatalism: an outcome depends on its causes, including efforts to prevent it. The desire to reshape one’s character is itself among those causes. Mill even concedes that believers in free will commonly feel the possibility of self-cultivation more vividly than necessitarians do. His account therefore acknowledges Chesterton’s psychological concern while disputing its logical inevitability. Mill, VI.ii.3, pp. 420–424.
On that account an encouraging conversation can change motives just as a changed physical setting can. Chesterton’s contrast between appealing to the will and changing the environment assumes that a caused will cannot meaningfully respond to reasons; Mill denies that assumption. Neither account alone settles what punishment is permissible. The paragraph is strongest as a warning that a causal explanation supplies no automatic guarantee of mercy, weaker as a demonstration that determinists cannot exhort.
Sources
Revision 1 of 1 · 2026-11-07 · Suggest an edit