The archive.

For a century, Mill's exalted tributes to Harriet Taylor were dismissed as the delusion of a besotted logician. Assembling letters, family testimony, and a scrupulous chronology, Hayek sets out to replace legend with evidence, tracing the friendship from Harriet's radical circle around W. J. Fox through scandal, chronic illness, concealed journeys to Italy, the 1851 marriage, and her death at Avignon in 1858. The documents present the bond as moral and intellectual discipline rather than romance: Harriet emerges as collaborator on the Principles of Political Economy and on the essays toward On Liberty, a judgment that reshaped Mill's rationalism. Hayek's method is his argument, letting dates and manuscripts do the work where gossip once ruled. What begins as archival restraint ends in bereavement, the edition closing on the widower's grief.

The spring of my life is broken.

By the end of the First World War, Hayek recalls, liberalism had all but ceased to be a living tradition for the young, kept alive only in the rhetoric of aging statesmen who no longer stirred the imagination. This short tribute to Ludwig von Mises, given here in the 1967 translation of the 1951 original, traces how economic freedom survived that eclipse through scattered teachers rather than parties: Edwin Cannan and his London pupils, Mises and the Austrian circle, Frank Knight and the Chicago school, and the German neoliberals Walter Eucken and Wilhelm Röpke. Mises holds the centre as the one thinker who rebuilt liberal doctrine most systematically. Liberalism, Hayek concludes, is less a policy preference than an inherited discipline that must be taught, translated and renewed before it can again become a living body of thought.

Gone is the day when the few remaining liberals each went his own way in solitude and derision; gone the day when they found no response among the young.

Can measures that accelerate mobilization today weaken the capacity to fight an unforeseen war tomorrow? In these statements at the 1951 Conference on the Economics of Mobilization, Hayek treats market adaptability as a military resource. His concern is not only that controls misallocate production, but that they create dependencies and habits of authority that outlast the emergency. European rent regulation supplies a concrete example; business leaders’ attraction to directing whole industries complicates any easy opposition between business and government. The article offers a focused encounter with Hayek’s argument that wartime efficiency requires room for relative prices to change—including prices to fall—and for entrepreneurs to discover economies that planners cannot anticipate. Preparedness, on this account, must be judged by its capacity for readjustment, not merely its immediate output.

Can a tax intended to reduce inequality instead protect established wealth against new competitors? In this review essay, presented in its 1953 English translation, Friedrich August von Hayek uses Walter J. Blum and Harry Kalven Jr.’s examination of progressive taxation to challenge its claims to justice. His distinctive objection concerns the treatment of identical services: annual progression can leave two people with different net rewards for the same work because their earlier earnings differ. He also argues that restricting new fortunes can obstruct upward mobility. Yet his position is not an unconditional demand for flat income-tax rates: he allows progression where it offsets indirect taxes borne by poorer people. The essay makes that distinction central, exposing the tension between redistribution, equal treatment, and political power over a taxpaying minority.

When the prestige of physics and biology tempts social thinkers to borrow their methods wholesale, the result, Hayek argues, is not science but scientism: a prejudiced approach that decides how to study society before examining it. This volume gathers his studies on that abuse of reason, first defending a subjectivist, compositive method in which institutions such as money, law, and markets exist only as the beliefs and purposes of those who use them, and collective terms like 'society' name patterns of individual conduct rather than agents. It then narrates the counter-revolution historically, from the École Polytechnique and Saint-Simon's engineers through Comtean sociology and its convergence with Hegel, tracing how impatience with evolved orders turned science into a model for social command. The through-line is epistemic: planning fails because dispersed knowledge exceeds any single directing mind.

So far as human actions are concerned the things are what the acting people think they are.

Can government help capital cross borders without deciding where it should be invested? In this 1953 article, Hayek proposes replacing American intergovernmental aid to Europe with temporary guarantees for private investment against political risks such as blocked transfers, discriminatory taxation, and expropriation. Investors would still choose borrowers and bear commercial losses. His objection to continued aid is not simply its cost: he argues that making recipient governments the chief suppliers of capital strengthens their control over business. The proposal exposes a tension within his preference for limited government: political uncertainty may require public protection if private investment is to resume. Readers can examine the precise boundary he draws between insuring against state action and directing economic activity.

How could Lord Acton praise the American Revolution while condemning the French? For Hayek, this contrast expresses a distinction between traditions of liberty, not an inconsistency. In this 1953 review, reprinted in 2013, he assesses Gertrude Himmelfarb’s account of Acton’s intellectual development alongside G. E. Fasnacht’s reconstruction of his political philosophy. Hayek’s own allegiance to English Whiggism shapes both his praise and his reservations: he welcomes Himmelfarb’s explanation of apparent contradictions but questions how far she places Acton from his earlier commitments. The review offers a compact encounter with Hayek as a reader of liberal history, showing how biography and unpublished manuscripts can clarify a thinker whose projected History of Liberty remained unwritten.

No purely factual history is possible in any politically relevant sense, Hayek maintains, because citizens judge their institutions through inherited stories about what those institutions have done. Introducing a wider inquiry into capitalism and industrialization, he takes aim at one such story: the legend that the Industrial Revolution impoverished and degraded the working classes. Drawing on Clapham and on concessions later made by the Hammonds, he argues that real wages and living standards generally rose, and that capital accumulation let a vastly larger proletarian population survive at all. Visible urban misery, Corn Law-era Tory propaganda against manufacturers, and socialist historicism from Marx to Sombart and the Webbs together fixed the darker picture as common sense. Hardship, he counters, more often flowed from monopoly, state action, and precapitalist restrictions than from the competitive order itself.

Political opinion and views about historical events ever have been and always must be closely connected.

Technical sophistication can narrow an economist’s understanding as well as sharpen it. In this review of Joseph Schumpeter’s posthumous History of Economic Analysis, later collected as “Schumpeter on the History of Economics,” Hayek asks what historical scholarship contributes to professional judgment. He admires Schumpeter’s command of original sources and willingness to unsettle familiar rankings, giving neglected thinkers their due while questioning the standing of canonical figures. Yet admiration does not erase disagreement: Hayek distinguishes Marx’s historical influence from his analytical achievement and objects to Schumpeter’s contemptuous treatment of nineteenth-century liberalism. This brief review offers a revealing encounter between two economists’ judgments—and a concrete account of why knowing older arguments matters when applying modern technical knowledge.

A functioning market, this revised Cologne lecture insists, demands not an absent state but a deliberately maintained legal framework — general, predictable rules applied equally to all, sharply distinguished from the discretionary administrative commands that corrode economic coordination. Speaking into the German debate over the soziale Marktwirtschaft and alongside Walter Eucken's ordoliberalism, Hayek presses the case in strict rule-of-law terms and dismantles the textbook ideal of 'perfect competition,' which mistakes an imagined final state for the discovery process by which markets actually work. He defends even the distressed, overinvested industry's right to fail against demands for cartels and protection, holding that competition's painful verdicts perform an accounting no administrative body can replace. The decisive task, he concludes, is educating opinion to accept competition consistently rather than licensing exceptions whenever it turns temporarily harmful.

Was wir wollen, ist nicht universelle Konkurrenz, sondern universelle Möglichkeit der Konkurrenz.

English translation: “What we want is not universal competition, but the universal possibility of competition.”

Where classical physics can specify its variables with precision, the sciences of complex order cannot, and Hayek builds an entire method around that limit. Accepting Popper's view that theories are deductive systems which forbid events and invite falsification, he rejects the further demand that science must always uncover new laws yielding exact predictions. Prediction, on his account, comes in degrees: to exclude a single outcome, narrow a range, or state a disjunction is still to predict. His central instrument is the explanation of the principle, which begins from familiar mechanisms and asks whether their combined operation could generate an observed pattern, evolution by natural selection being the paradigm. For biology, economics, and institutions, the honest goal is orientation and cultivation, not the control the physics template falsely promises.

The practical value of such knowledge consists indeed largely in that it protects us from striving for incompatible aims.

Specialization is indispensable to serious inquiry and, in the study of society, uniquely dangerous, and that is the tension this lecture-essay sets out to hold. A physicist may work fruitfully within a narrow technical field, but the student of society who masters only one discipline may misunderstand the very world he examines, since concrete social problems draw on law, economics, history, anthropology, philosophy, and inherited cultural wisdom at once. Hayek distinguishes systematic specialization in a theoretical field, which trains rigor, from topical specialization around an empirical object, which mature work demands; the danger lies in sequencing, for breadth without discipline becomes amateurism while discipline without breadth becomes blindness. He couples this with his anti-rationalist caution against discarding traditions whose significance we cannot yet articulate, and proposes settings, such as a College of Advanced Human Studies, where disciplines can meet after competence is won.

But nobody can be a great economist who is only an economist—and I am even tempted to add that the economist who is only an economist is likely to become a nuisance if not a positive danger.