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tech 30 June 2026

Understanding Popular Delusions: Lessons from the Past for Today

Discover how past collective delusions, as described by Charles Mackay, provide relevant insights for today's economic and societal challenges.

Article inspired by the original source
Memoirs of Extraordinary Popular Delusions and the Madness of Crowds (1852) ↗ www.gutenberg.org

Introduction: A Dive into Collective Delusions

Charles Mackay, in his work "Memoirs of Extraordinary Popular Delusions and the Madness of Crowds," offers a fascinating exploration of crowd psychology. First published in 1841, this book dissects collective manias ranging from financial bubbles to religious crusades. So, why does this work still resonate today?

Financial Bubbles: Timeless Lessons

Mackay devoted a significant portion of his writing to financial bubbles such as the Dutch "tulipomania" and the "Mississippi Scheme." These episodes illustrate how greed and euphoria can artificially inflate asset values, leading to spectacular crashes. According to a 2022 World Bank study, speculative bubbles continue to occur with average losses of 25% of the affected markets' value.

Crusades and Religious Delusions

The crusades, another topic tackled by Mackay, show how religious beliefs can galvanize entire crowds into costly and often futile adventures. Today, these phenomena echo in modern religious extremism, where the manipulation of faith and fear can lead to unpredictable mass movements.

Witch Mania: A Study of Fear

The witch trials of the past, detailed by Mackay, exemplify how fear and superstition can lead to irrational and destructive behaviors. Similarly, the COVID-19 pandemic saw the rise of conspiracy theories, which, according to a 2021 Princeton University study, influenced the behavior of up to 30% of Americans.

Alchemy and the Quest for the Impossible

Alchemy, with its promises of transmuting metals into gold, is a powerful metaphor for today's tech ventures, which sometimes pursue ambitious but unrealistic goals. Silicon Valley startups, for example, have often been criticized for their inflated valuations and exaggerated promises.

Conclusion: Lessons for Today and Tomorrow

Mackay's "Extraordinary Popular Delusions" are not just historical curiosities. They offer valuable lessons on the importance of vigilance and rationality in a world where crowds can still be swept away by delusions. So, how can we avoid these traps today? By fostering education, critical thinking, and transparency in all aspects of society.

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psychologie des foules bulles financières illusions collectives Charles Mackay histoire économique
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