Greg Smith's resignation from Goldman Sachs became one of the most discussed moments in modern financial industry culture when the 12-year Goldman veteran published his letter of resignation in the opinion pages of the New York Times in March 2012, accusing the firm of having abandoned its commitment to client interests in favor of a culture focused solely on maximizing revenues by exploiting those same clients.

"The firm has veered so far from the place I joined right out of college that I can no longer in good conscience say that I identify with what it stands for," Smith wrote, using terms like "muppets" — which he said Goldman employees used internally to describe clients — to illustrate what he characterized as deep cultural rot.

The piece immediately became a global sensation. Within hours it had been read millions of times. Goldman's stock fell on the day of publication. The firm's leadership was forced to publicly defend its culture and its commitment to client service.

Goldman's response was predictable and vigorous: the firm commissioned internal surveys that it said showed employee satisfaction remained high, characterized Smith as a disgruntled underperformer, and dismissed his account as unrepresentative.

What made Smith's letter so powerful was not its specific revelations — much of what he described had been documented in the aftermath of the 2008 financial crisis, including in Congressional testimony and regulatory proceedings — but its authorship. Here was someone who had spent 12 years inside the machine, risen to a vice president role, and concluded that the institution was fundamentally broken in its relationship to the clients it was supposed to serve.

Smith subsequently expanded his account into a book, which received mixed reviews. But the original letter had already done its work — forcing a public reckoning with the cultural values of one of finance's most powerful institutions.