Mr. Karp’s problems began months ago when embarrassing revelations about his dealings with Mr. Epstein began to dribble out of the Justice Department’s files.
Over the past week, the firm had informally surveyed clients about their reactions to the mentions of Mr. Karp in the files, one of the partners said. A small number of clients told the firm’s lawyers that they would have to reconsider future business with the firm because of the reputational risk.
In one of the newly released emails, Mr. Epstein suggested to Mr. Karp that Mr. Black should hire a private investigator to surveil a former mistress. Mr. Black, a co-founder of Apollo Global Management, is a major Paul Weiss client.
I recently learned about the “vampire rule”—which provides, in a nutshell, that a vampire can’t enter your home unless you invite it in. The rule’s canonical formulation can be found in Bram Stoker’s gothic horror novel, Dracula (1897): a vampire “may not enter anywhere at the first, unless there be some one of the household who bid him to come, though afterwards he can come as he please.”
The rule figures prominently in Sinners, which just snagged a record 16 Oscar nominations. It’s invoked in discussions of Wolford v. Lopez, a pending U.S. Supreme Court case about whether Hawaii can prohibit the carrying of handguns on private property unless the property owner affirmatively grants permission.
And the vampire rule might be an apt explanation for the sudden resignation of Brad Karp as chairman of Paul Weiss, the firm he has led since 2008.
Alliance Theory suggests that human behavior, moralizing, and social maneuvering serve the primary function of maintaining and expanding power alliances. In this framework, people do not follow abstract principles; they use principles as tools to signal loyalty to their “side” or to recruit allies against a common enemy. The transition of Paul Weiss from a litigation powerhouse to a corporate-dominated firm illustrates several of Pinsof’s core concepts.
Under David Pinsof’s model, groups use “virtue signaling” to define the boundaries of their alliance. For decades, Paul Weiss signaled its alliance with the liberal, public-spirited elite. Brad Karp used this traditional brand to maintain the firm’s prestige while simultaneously executing a “Trojan Horse” strategy. By inviting Scott Barshay and the private equity partners into the household—the vampire rule mentioned in the article—Karp was trading cultural homogeneity for raw economic power.
In Alliance Theory, “truth” is secondary to “utility.” Karp likely viewed the addition of high-revenue corporate partners as a way to bolster the firm’s status (the primary alliance goal). However, he ignored the fact that these new members belonged to a different “tribe” with different alliance needs. The corporate partners prioritize alliances with capital and the administrative state, whereas the old-guard litigators prioritized alliances with the Democratic establishment and civil society.
Pinsof argues that moral indignation is a weapon used to coordinate attacks on rivals. The “vampire rule” here represents the moment two incompatible alliance strategies tried to occupy the same space.
The Litigators used progressive causes to cement their status within the legal and political elite.
The Corporate Partners viewed these same progressive causes as “costs” or “risks” that threatened their alliances with corporate boards and, eventually, the Trump administration.
When the Trump administration targeted the firm, the corporate faction saw the firm’s progressive “virtue signaling” not as a noble pursuit, but as a strategic liability. According to Alliance Theory, when a leader’s actions threaten the safety or prosperity of the alliance, the subordinates will “moralize” a reason to remove them.
The release of the Jeffrey Epstein emails provided the perfect “coordination device.” In Alliance Theory, scandals are often used as pretexts. The corporate faction, led by Barshay, likely already wanted to seize control to protect their deals from political retribution. However, removing a successful chairman requires a moral justification that can unite the rest of the “tribe.”
The emails showing Karp’s correspondence with Epstein allowed the corporate faction to frame Karp’s removal not as a naked power grab, but as a moral necessity. By using the “victims” (in quotes) comment against him, the Barshay faction could claim they were protecting the firm’s reputation. Pinsof would argue this is a classic “moral trap”: the corporate partners—who generally prefer a bottom-line approach—suddenly adopted the language of moral outrage to facilitate a leadership change that served their economic interests.
Ultimately, the story confirms Pinsof’s view that social structures evolve toward whatever maximizes the power of the dominant alliance. The “vampire” didn’t just enter; it redefined the household. By shifting the revenue majority to 55% corporate, the “center of gravity” for alliances shifted. The firm stopped being a “liberal litigation shop” and became a “capital-servicing engine.”
Karp’s fall is the result of failing to realize that once you change the source of your power (from prestige-litigation to high-stakes M&A), you change the rules of the alliance. The new dominant faction no longer needed a leader who signaled to the old elite; they needed a leader who mirrored their own transactional values.
ChatGPT says: The core mistake was not ethical. It was coalitional.
Paul, Weiss, Rifkind, Wharton & Garrison operated for decades as a litigation centered alliance. Status inside the firm came from trial skill, public power, and political positioning. The firm’s identity was legible. You knew who mattered, why they mattered, and what loyalty meant.
Brad Karp did not simply modernize the firm. He changed the dominant alliance without enforcing boundary control.
Alliance Theory calls this inviting in a coalition with a different fitness function.
Litigators optimize for prestige, moral authority, and institutional memory. Their currency is reputation across courts, government, and media. Corporate rainmakers optimize for throughput, regulatory calm, and client risk minimization. Their currency is deal flow and client confidence.
Those currencies are not commensurable. They coexist only if one alliance clearly rules and the other is subordinate.
Karp broke the vampire rule by importing a rival alliance and letting it accumulate power without cultural submission. The dealmakers were not assimilated. They were empowered.
Once transactional revenue crossed the tipping point, the alliance hierarchy inverted. Status followed money. Decision rights followed status. Norms followed decision rights.
At that point, the old culture became a liability signal.
Public spirited litigation reads to corporate clients as volatility. Political engagement reads as reputational risk. Pro bono becomes brand exposure, not moral capital. Under Alliance Theory, those signals trigger defensive coalition behavior.
The Trump settlement was not cowardice. It was alliance logic. When your dominant coalition depends on regulatory clearance, confrontation with sovereign power is irrational. Fighting would have served the old alliance’s values but threatened the new alliance’s survival.
The Epstein emails mattered less than people think. They were not the cause. They were the excuse. Alliances rarely overthrow leaders for abstract morality. They act when moral narratives legitimize a power transfer that already makes sense.
Scott Barshay did not seize power. His alliance became numerically and economically decisive. The chairmanship followed that reality.
This is why the story generalizes beyond Paul Weiss.
Biglaw in 2026 is undergoing alliance compression. Corporate practices scale better, offend fewer power centers, and align with state and capital. Litigation, especially politicized litigation, produces external enemies and internal friction.
Firms that try to run dual alliance systems without hard boundaries will see the same outcome. The coalition with the clearer payoff structure wins.
The sadness former partners feel is real but misplaced. Cultures do not die from betrayal. They die from losing dominance.
The forward looking lesson is blunt.
If you want to preserve a values driven subculture inside a profit driven institution, you must cap its rival’s power or spin it out. Prestige alone cannot restrain revenue once revenue becomes the status metric.
Karp did what rational leaders do when they misread alliance dynamics. He optimized for institutional growth and forgot that growth changes who the institution is for.
The vampire did not destroy the house. The house invited a creature with different survival rules and then wondered why the furniture moved.
