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Back to The South Sea Bubble: How England Lost Its Mind in 1720
EnablerSouth Sea Company director and financierEngland

Sir Theodore Janssen

1658 - 1748

Sir Theodore Janssen was one of the South Sea Company directors whose name surfaced in the aftermath because the crash did not merely expose a bad market; it exposed a governing circle that had profited from the rise. Janssen had a background in finance and public credit, and that made him useful in a system built on the fusion of expertise and confidence. In a more stable market, he might be remembered as a financier. In this one, he became part of the scandal.

His psychology, insofar as the historical record allows us to infer it, seems aligned with the classic insider’s confidence: a belief that the mechanisms of finance can be managed if one has enough information, enough relationships, and enough time. That mentality is not identical to criminal intent, but it can easily shade into it when public power and private gain reinforce each other. The South Sea scheme rewarded precisely the people positioned to benefit from opacity.

Janssen mattered because directors were not passive passengers. They were expected to manage subscriptions, reassure the market, and, according to later inquiry, participate in the distribution of favors that kept the political lid on the operation. Whether every accusation against him can be established to the modern standard is less important than the broader pattern: the company’s leadership was implicated in a system where stock promotion and political insulation fed one another.

After the bubble, Janssen’s fortune and reputation were among the things put under scrutiny. The historical record makes clear that some directors were compelled to surrender assets or accept penalties. That punishment reflects the era’s attempt to name and contain a crisis that had become national in scale. Even where legal concepts were less formalized than in modern securities law, the moral verdict was unmistakable.

Janssen’s lasting significance is that he shows how financial institutions can become conspiracies of respectable people. A bubble is easier to sustain when it is staffed by names that sound like creditworthiness. That is why his role belongs in the documentary: he personifies the respectable face of a deeply destabilizing enterprise.

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