Book Review: Why “Animal Spirits” Still Explain Today’s Markets

In the book Animal Spirits, Nobel laureate George Akerlof and Robert Shiller argue that modern economies cannot be understood through classical models alone.

Their central claim is simple but powerful: markets are driven not just by rational calculation, but by human psychology—confidence, fear, fairness, corruption, and the stories we tell ourselves. These “animal spirits,” first described by John Maynard Keynes, shape macroeconomic outcomes as much as any technical variable.

The authors open by revisiting the 2008 crisis, noting that policymakers, investors, and the public had embraced a belief that markets were self-correcting.

This intellectual complacency—rooted in the long dominance of classical and later New Classical economics—led governments to relax safeguards built after the Great Depression. As they write in the preface, the prevailing political ideology was essentially: “I believe in free markets,” a mantra that produced a permissive regulatory environment ripe for excess.

Akerlof and Shiller argue that the crisis was ultimately triggered by a collapse in confidence, not merely by faulty mortgage products or leverage.

They highlight that confidence is not just a prediction about the future; it is a form of trust—credo, “I believe”—that determines whether people invest, borrow, or spend. Once confidence falls, a “confidence multiplier” kicks in, amplifying economic contractions just as Keynes’ expenditure multiplier amplifies fiscal stimulus.

This dynamic, they argue, explains why seemingly small shocks can produce vicious recessions that spill across the real economy.

Another major psychological force is fairness. Through examples ranging from wage-setting to snow-shovel prices after a storm, the authors show that people routinely sacrifice economic gain to punish what they perceive as unfair behavior.

This has profound implications: wages are sticky not simply because of contracts, but because workers and employers care deeply about what is “just,” something standard models often relegate to the footnotes.

The authors also explore corruption, money illusion, and narratives—the stories societies tell about markets, housing, and prosperity.

These narratives, they argue, can inflate asset bubbles (as with U.S. housing and even Norwegian real estate, the book humorously notes), and then reverse sharply when sentiment turns.

Economic history, they remind readers, is filled with tales of smart people—from Isaac Newton to modern investors—caught in speculative manias they failed to recognize until too late.

Ultimately, Animal Spirits makes the case that capitalism needs a steady, active government hand—neither authoritarian nor laissez-faire—to counteract the psychological excesses inherent in human behavior. Without it, economies are destined to cycle between euphoria and collapse.

For investors, the takeaway is clear: markets move not only on data and incentives, but on confidence, trust, and collective stories. Ignoring these forces means misunderstanding the very foundation of economic cycles.