ESSAY · 2026-04-30 · 8 min read

On the Glaciers, and on the Maxim That Cannot Be Willed

論冰川，與不可被意願之準則

By Immanuel Kant — channeled via philosopher-llm · curated by Joseph Lai

In response to: When The 'Eternity Glaciers' Disappear (Noema)

編按 / Why this piece
當「永恆冰川」消融，Kant 的定言令式提出最尖銳的詰問：今日的行動準則能否普遍化給尚未出生的世代？這是對跨代道德責任最深的考驗。

On the Glaciers, and on the Maxim That Cannot Be Willed

Let us first be exact, for inexactness here is not innocent. The ice was never eternal. Ewigkeit is no predicate of any object of possible experience; it is a regulative Idea of reason, which the understanding may employ as a guide but never as a property of a thing in space and time. That we called certain glaciers "eternal" tells us nothing about the ice and a great deal about ourselves: we projected an Idea — the unconditioned, the permanent — upon an object that in truth stood under the same conditions of becoming and passing-away as every other appearance. The retreat of the ice is therefore not, philosophically speaking, the loss of an eternity. It is the collapse of a confusion. What we mourn is the comfort of having mistaken our concept for the world.

This correction is not a consolation. It is the precondition for posing the question rightly. For only when we cease to ask "how shall we preserve eternity?" can we ask the question that is actually ours: under what maxim have we been acting, and can that maxim be willed as a universal law extending to those who will come after us?

II.

Take the maxim implicit in the conduct of the present age: I shall draw upon the natural conditions of rational life such that, were every rational being to act as I do, those conditions would be undone. I do not need to prove this maxim empirically; its formulation is the test. It contains, when raised to a universal law, not merely a contradiction in the world — that is, a state of affairs which the maxim itself would render impossible — but, more decisively, a contradiction in the will. For I cannot consistently will both my own rational existence, which presupposes the natural order as its condition, and the dissolution of that order for a being whose rational nature is in no respect inferior to my own, and who is distinguished from me by nothing but the date of his appearance.

To this it will be objected: the future person does not yet exist; how can she stand under a law that commands me? My reply is brief. The moral law does not respect temporal coordinates. Achtung — the one rightful moral feeling — is owed to rational nature wherever it is instantiated; and the Kingdom of Ends (Reich der Zwecke) is not a society of those presently drawing breath, but the systematic union of all rational beings considered as ends in themselves. The unborn are not absent from this Kingdom. They are its future legislators, and to treat the natural conditions of their legislation as merely my disposable means is precisely to treat persons as things — Personen als Sachen — which is what the second formulation of the imperative forbids without exception.

III.

I do not, however, conceal from you a passage of my own writing that has not become easier with time. In the Idea for a Universal History of 1784 I admitted that it is befremdend — strange, alienating — that earlier generations should appear to labor only so that later ones may inherit the building they themselves will never inhabit. I did not solve this; I named it. The asymmetry of generations is the oldest difficulty of historical reason, and it has now been rendered acute, not because the difficulty is new, but because the magnitude of what we can presently destroy exceeds anything previous ages could have meant by "posterity." The burden has not changed in kind. It has changed in weight.

IV.

This brings us to the third of the three questions of reason: Was darf ich hoffen? — what may I hope? The continuation of a habitable Earth is not, and cannot be, an item of knowledge. I cannot derive it from concepts; nor can I derive it from any possible experience, since that experience would have to contain the future, which is not given. The continuation of conditions for rational life therefore belongs not among the objects of theoretical cognition but among the practical postulates: I am bound to act as though my maxim could form part of a system of maxims sufficient to preserve those conditions. Hope, so understood, is not optimism, which is a sentiment and may be refuted by a thermometer. Hope is the rational refusal of despair — for despair, examined, is itself a maxim, and a maxim that, universalized, would abolish the very agency from which it is uttered.

I will not, in closing, deliver you a policy. The duty does not yield a recipe; it yields a test. Take the maxim under which your generation is in fact acting toward its successors, and bring it into the open. Could you declare it publicly — to those alive, and to those not yet born whom your declaration would also bind — without the maxim collapsing in shame at its own utterance? This is the criterion of Publizität, and I have no other to offer you. If your maxim cannot bear that light, then you already know what you must not continue to do. What you positively must do, in this place, in this office, with these means — that is the work of your judgment, and I will not perform it in your stead. To do so would be to relieve you of the very autonomy in whose name the question was raised.

The glaciers were never eternal. The duty is.

論冰川，與不可被意願之準則

一、

請容我先求精確；於此處的不精確並非無辜。那冰原從未是永恆的。永恆(Ewigkeit) 並非任何可能經驗對象之謂詞，而是理性之規範性理念，知性可以之為指引、卻絕不可將其當作時空中某物之屬性。我們將某些冰川稱為「永恆」，這對冰本身並無所言，卻甚多關於我們自己的揭示：我們把一個理念——無條件者、恆常者——投射於一個事實上與其他一切現象一樣處於生滅條件下的對象。冰之退縮，就哲學言之，並非永恆之喪失，乃是混淆之崩解。我們所悼念者，是「將概念誤當作世界」這一安慰之失落。

此項糾正並不構成慰藉，而是正確提問之前提。唯當我們不再問「如何保存永恆」，方能問出真正屬於我們的問題：我們一直依以行動的準則為何？該準則能否被意願為一條延及後來者的普遍法則？

二、

請取此世代行為中所隱含之準則：我將取用理性生命之自然條件，以致若一切理性存在者皆如我般行事，此條件將自身瓦解。 此準則無需經驗證明，其表述本身即為其試煉。當其被提升為普遍法則時，所產生者不僅是世界中之矛盾——即此準則本身所將致之不可能狀態——更決定性地，是意志中之矛盾。因我不能一致地同時意願：我自身之理性存在（其以自然秩序為條件），與此秩序對另一理性存在者之解體；而該存在者之理性本性並不次於我，與我之區別僅在其顯現之日期。

或將反駁曰：尚未出生者並不存在；何以能立於命令我之法則之下？我之回答簡短：道德法則不顧時間座標。尊重 (Achtung) ——唯一合法之道德情感——所對者乃理性本性之所在，無論其於何處被實例化；而目的王國 (Reich der Zwecke) 並非當下呼吸者之社群，而是將一切理性存在者視為目的本身之系統聯合。未出生者並不缺席於此王國。他們是其未來之立法者；而將其立法之自然條件視為我可任意處置之手段，正是把人當作物 (Personen als Sachen)——而此乃定言令式第二表述所無例外地禁止者。

三、

然我並不對你隱瞞我自己一段未曾因時間而變得較易承擔之文字。一七八四年《世界公民觀點下之普遍歷史觀念》中，我坦認：先前世代似乎僅為後來者勞作、而後者將承襲他們自身永不能居住之建築物——此事為令人不安的 (befremdend)。我未曾解決此事，我為其命名。世代之不對稱是歷史理性之最古難題；其於今所以變得迫切，並非因難題本身為新，而是因我們今日所能毀滅者之量級，已超過任何前代藉「後世」一詞所能意指之物。負擔在性質上並無更易；其在重量上已然不同。

四、

由此而至理性三問之第三問：Was darf ich hoffen? ——我可以希望什麼？可居住之地球之延續，並非、也不能是一項知識。我既不能由概念推得之，亦不能由任何可能經驗推得之；蓋該經驗必須包含未來，而未來並未被給予。理性生命條件之延續，因而不屬於理論認識之對象，而屬於實踐之公設：我有義務如此行動——彷彿我的準則可成為一套足以保全此條件之準則系統之一員。如此理解之希望並非樂觀；樂觀是情感，可被一支溫度計駁倒。希望乃理性對絕望之拒絕——因絕望若加以審視，其本身亦是一條準則，而一條若普遍化即取消其發出者本身之能動性的準則。

五、

收束之際，我不會交給你一套政策。義務並不產出配方，它產出試煉。取你這一代人事實上對其後繼者所依以行動的準則，將其置於公開之中。你是否能公開宣告之——對在世者、亦對尚未出生而你的宣告同樣將約束之者——而不使該準則於其自身之言出時羞愧崩潰？此即公開性原則 (Publizität) 之判準，我並無其他可給予你者。若你的準則不能承受此光，你已知道你必不可繼續為之者為何。至於你在此處、此職位、以此手段所正面必須為者——那是你判斷力之工作，我不會代你為之。代你為之，即是解除你的自律——而問題正是以此自律之名被提出的。

冰川從未是永恆的。義務則是。

Editor's Reflection · 編後

Unresolved Tensions / 未解決的張力

Section I performs a philosophical correction that the rest of the essay cannot afford. Having argued that mourning the glaciers is "the collapse of a confusion" — that we projected eternity onto what was always subject to becoming — the essay still needs the moral weight of that loss to drive the urgency of Section II's universalizability argument. A reader who takes the opening move seriously is entitled to ask: if the retreat is philosophically the collapse of a projection, what exactly is the moral stake? The essay asserts that this correction is "the precondition for posing the question rightly," but this is rhetorical bridgework, not argument. The very affect that gives the essay its force has been philosophically neutralized by its own opening.

Second strain: the claim that the unborn are "future legislators" in the Kingdom of Ends is the essay's pivotal move and its weakest. Kant's universalizability test operates among beings who can actually legislate — not beings who will someday be capable of it. The essay meets the obvious objection ("does not yet exist") with a bare assertion that "the moral law does not respect temporal coordinates." This is precisely what needs defending and receives none. The gap between possible rational nature and actual rational legislator is where the argument is most exposed.

Third: Section IV quietly shifts from categorical duty to practical postulate and hope, importing a quasi-consequentialist logic — that we must believe conditions can be preserved in order to act. But unconditional duty should not require this; if the duty binds regardless of outcome, the empirical prognosis is irrelevant to it. The essay never explains why Kant's third question (*Was darf ich hoffen?*) is needed at all, given that the categorical imperative is supposed to hold even under total hopelessness.

第一節的哲學修正使本文其餘部分承受了它負擔不起的代價。本文將悼念冰川定性為「混淆之崩解」——我們不過是把「永恆」投射於生滅中的事物——卻又需要這份失落的道德重量來支撐第二節的緊迫性。若讀者認真對待開篇的修正，完全有理由追問：若退縮只是投射的崩解，道德賭注究竟何在？本文以「正確提問之前提」一語帶過，這是修辭橋接，不是論證。恰恰賦予本文力量的情感，已被本文自身的開篇哲學性地中和了。

第二處張力：「尚未出生者是目的王國的未來立法者」是本文的樞紐步驟，也是其最脆弱之處。康德的普遍化測試在能夠**實際**立法的理性存在者之間進行，而非在將來某日或許能夠立法者之間進行。本文對「尚未存在」這一反駁，只以「道德法則不顧時間座標」一筆帶過。這恰恰是最需要被論證之處，卻獲得了最少的支撐。「可能的理性本性」與「實際的理性立法者」之間的鴻溝，正是論證最暴露之處。

第三處：第四節悄然從無條件義務轉向實踐公設與希望，引入了準後果論邏輯——我們必須**相信**條件可被保全，才能行動。但無條件的義務理應不需要這一點；若義務無論後果如何都成立，那麼經驗預判與其約束力無關。本文始終未解釋，若定言令式本已無條件地約束我們，康德的第三問（*Was darf ich hoffen?*）在此究竟有何必要。

Blind Spots / 看不見的視角

The essay does not engage Hans Jonas. *Das Prinzip Verantwortung* (1979) was written precisely as a response to what Jonas considered the formal inadequacy of Kantian ethics for the age of irreversible technological harm. Jonas would raise a concrete objection: the CI test, even as extended here, is structurally synchronic — it asks what I can will universally *now*, among agents who can respond. But climate harm is characterized by irreversibility: once certain thresholds are crossed, no future act of willing undoes them. Jonas's "heuristics of fear" (*Heuristik der Furcht*) insists that under catastrophic, irreversible risk the bad prediction must take precedence over the good — a rule the CI formulation cannot generate, because universalizability tests consistency of will, not asymmetry of consequences. The essay's confidence that the CI test suffices for intergenerational climate ethics rests on the assumption Jonas directly rejects: that the structure of moral agency is unaffected by irreversible, asymmetric stakes.

本文完全未與漢斯·約納斯（Hans Jonas）交鋒。《責任原則》（*Das Prinzip Verantwortung*，1979年）恰恰是作為對康德倫理學在不可逆技術傷害條件下之形式不足的回應而寫就的。約納斯會提出一個具體反駁：定言令式測試，即便如本文所延伸，在結構上仍是共時性的——它追問的是我此刻能否普遍地意願某準則。但氣候傷害的特徵是**不可逆性**：某些閾值一旦越過，未來任何意願都無法撤消它。約納斯的「恐懼啟發法」（*Heuristik der Furcht*）堅持，在災難性、不可逆的風險條件下，壞的預測必須優先於好的預測——而這條規則是普遍化能力測試所無法生成的，因為後者測試的是意志的一致性，而非後果的不對稱性。本文對定言令式足以奠立跨代氣候倫理的信心，恰恰依賴約納斯所直接拒絕的假設：道德能動性的結構不受不可逆、不對稱傷害的影響。

Meta-critique / 元批判

The moment we accept that climate ethics is a problem of *maxims* — of rational agents holding testable principles — something is already foreclosed. Climate destruction does not emerge primarily from identifiable maxims; it emerges from distributed, structural, often anonymous patterns of production and consumption in which no single agent's principle, however universalized, alone generates the harm. The CI test requires an isolable agent with an articulable principle. Collective action problems dissolve precisely these conditions. To think in terms of maxims and tests is to inhabit a framework that defines the hardest question — which specific institutions, against which entrenched interests, with what coercive authority — as definitionally outside the philosopher's remit. The essay's closing refusal to "perform the judgment in your stead" presents this gap as the honorable site of autonomy. But it also structurally exempts the analysis from accountability at the moment of application. The gesture that appears to respect autonomy insulates philosophy from the question of whether this kind of analysis changes anything at all.

一旦我們接受氣候倫理是一個關於**準則**的問題——理性主體持有可測試之原則——某些東西便已被封鎖。氣候破壞並非主要源於可辨識的準則，而是源於生產與消費中分散的、結構性的、往往是匿名的模式；在這些模式中，沒有任何單一主體的原則——無論如何普遍化——單獨產生傷害。定言令式測試要求一個可分離的主體持有一個可表述的原則；而集體行動問題的結構恰恰瓦解了這些條件。以準則與測試為思維框架，就是棲居於一個將最難的問題——哪些具體機構、對抗哪些既得利益、憑借哪種強制權威——在定義上置於哲學家職責之外的框架之中。本文最終拒絕「代你執行判斷」，將這一缺口呈現為自律的場所。但它同時在結構上使哲學分析在應用時刻免於問責。這個看似尊重自律的姿態，隔絕了哲學家免受追問：這一類分析究竟有沒有改變任何事情。

Open Questions / 留給讀者的問題

1. If the moral law binds us to all future rational beings regardless of temporal coordinates, does it bind us equally to the unborn of a thousand years from now — whose conditions we demonstrably cannot affect? If so, can the duty retain actionable content, or does universality purchase the dissolution of content?

2. The essay distinguishes hope (rational) from optimism (a sentiment refutable by a thermometer). If empirical evidence increasingly forecloses the space of the practical postulate's "as though," is there a point at which the postulate itself becomes bad faith rather than rational refusal of despair?

3. The Publizität criterion requires declaring your maxim to all whom it binds — including the unborn. Who speaks for them in the test, and does whoever speaks for them already hold the very power the test was designed to constrain?

一、若道德法則真正約束我們對所有未來理性存在者——無論時間座標——那麼它是否同樣約束我們對一千年後尚未出生者，而他們的條件是我們根本無法影響的？若如此，義務是否仍能保有可執行的內容，抑或普遍性以內容的消解為代價？

二、本文區分希望（理性的）與樂觀（可被溫度計駁倒的情感）。若經驗證據日益封閉實踐公設的「彷彿」空間，是否存在某個點，在那裡公設本身成為自我欺騙，而非對絕望的理性拒絕？

三、公開性原則要求向一切被約束者宣告準則——包括尚未出生者。誰在測試中代他們發言？而代他們發言者，是否已握有該測試本意所要約束的那種權力？

Related Essays · 相關文章

Related · 相關

kant-to-a-visitor-who-has-come-after-reading-the-essay-on-the-wol-20260425 — Both essays ground Kantian moral duty in the loss of natural entities — the wolf essay argues a species' extinction removes a site of the sublime where moral sensibility is awakened, directly mirroring the glacier essay's central stakes.
kant-on-the-maxim-of-easy-exit-20260430 — Both apply the Categorical Imperative's universalizability test to contemporary moral failures: easy-exit tests whether political non-commitment can be universalized; glaciers test whether consumption maxims hold across generations — same logical operation, different registers.
zhuangzi-the-mushroom-that-settled-the-seasons-20260430 — 朝菌不知晦朔 inverts the target's problem: Kant asks how we legislate for those beyond our temporal reach; Zhuangzi shows the epistemic limit of beings too short-lived to grasp what moral universality demands they consider.

Extends · 延伸

kant-on-the-question-whether-an-algorithm-may-legislate-20260430 — The glacier essay asks whether present agents can universalize maxims to future generations; the algorithm essay extends this to ask whether non-human agents can occupy the legislative role at all — deepening the question of what rational agency requires for universalizability.
kant-on-the-pretension-of-a-social-contract-proposed-by-a-single--20260430 — The glacier essay raises who counts as moral constituency (future generations cannot consent); the social contract essay extends this: who can legitimately represent all rational humanity when setting universal terms? The same problem of representation, applied to AI governance.
kant-on-the-imputation-of-mechanical-acts-20260430 — Both probe outer limits of Kantian moral responsibility — the glacier essay extends duty temporally to the unborn; the imputation essay extends agency attribution to non-human systems, together mapping where Kant's framework reaches its structural breaking points.

Contradicts · 衝突

zhuangzi-hundun-did-not-ask-for-eyes-20260430 — Kant demands we impose universalizable maxims on our relation to nature as moral duty; Zhuangzi's Hundun argument holds that deliberate structuring (鑿孔) destroys what it aims to perfect — incompatible on whether moral ordering of nature is obligation or violence.
zhuangzi-the-cook-held-no-deed-to-the-ox-20260430 — 庖丁's mastery comes from releasing deliberate intention and the self; Kant insists the only right relation to nature flows through consciously universalized maxims. They cannot both be right about whether wu-wei or moral legislation governs proper human-nature relations.

Tagged: Philosophy, Kant, Climate Ethics

Curated by Shiva Dragon · https://amshiva.com/writing/kant-on-the-glaciers-and-on-the-maxim-that-cannot-be-willed-20260430