San Francisco

San Francisco was more than a neighboring city in J. Robert Oppenheimer’s California life: it was a place where his Berkeley circle gathered over meals and physics, where labor conflict erupted into public violence, and where federal authorities pursued an investigation that implicated his former student Joseph Weinberg. The city’s role shifts across these episodes, from a setting for cultivated sociability to a center of collective protest and political pressure.

Berkeley’s social and intellectual orbit

Oppenheimer’s connection to San Francisco was shaped by its proximity to Berkeley and by the routes that joined the two. After late-afternoon seminars, he sometimes invited a roomful of students to dinner at Jack’s Restaurant, at 615 Sacramento Street. Before 1933, Prohibition was still in force, but Oppenheimer knew the city’s restaurants and speakeasies. Later, while waiting for the ferry from Berkeley, the group could stop for a drink at one of the bars along the wharf before continuing to dinner. Oppenheimer chose the wines and helped students select from the menu, then paid the bill himself. The journey and the meal made the city part of a social education as well as an academic one: students encountered a standard of food, wine, and gracious living that many had not known.

That sociability belonged to a wider pattern of close contact between Oppenheimer and his students. On Monday evenings, he and Ernest Lawrence led a physics colloquium open to graduate students from both Berkeley and Stanford, generally organized around a recent paper in Nature or Physical Review. At Leo Nedelsky’s house, where several students rented rooms, tea and cake were served around ten each evening; conversation and games of tiddlywinks sometimes continued until two or three in the morning. These gatherings were not all in San Francisco, but they help explain why the city’s restaurants and ferry crossings mattered: the boundary between academic work and shared life was unusually permeable.

The waterfront and the 1934 labor struggle

In 1934, San Francisco’s port became the focal point of a labor confrontation that exposed the human costs of the Depression and divided Berkeley. On May 9, more than 12,000 longshoremen established picket lines at ports along the West Coast. By the end of June, the dock strike had nearly strangled the economies of California, Oregon, and Washington. When authorities tried to reopen the port of San Francisco in early July, police used tear gas against thousands of longshoremen, and rioting followed. After days of skirmishes, police gunfire wounded three men; two died. July 5 became known as Bloody Thursday. That same day, the Republican governor ordered the California National Guard to take control of the streets.

Eleven days later, San Francisco labor unions called a general strike. For four days, the city was paralyzed. Federal mediators intervened, and the largest strike in West Coast history ended by July 30. The longshoremen returned to work having won almost none of their wage demands, but the strike had generated public sympathy and strengthened the union movement. Its political consequences reached beyond the waterfront: on August 28, radical writer Upton Sinclair decisively won the Democratic nomination for governor of California. Although Sinclair lost the general election amid Republican slander and fear-mongering, the campaign signaled a durable change in the state’s political climate.

The dispute also entered Oppenheimer’s Berkeley circle. While a conservative physics faculty member recruited football players to break the strike, Oppenheimer invited students including Melba Phillips and Robert Serber to a longshoremen’s rally in a large San Francisco auditorium. From a high balcony, they joined the crowd’s chants. Afterwards, Oppenheimer went to a friend’s apartment and met Harry Bridges, the longshoremen’s prominent union leader. For Oppenheimer and his students, the city made political conflict immediate: not an abstraction discussed in a seminar, but a mass gathering and a struggle over who could work, on what terms, and under whose authority.

Investigation and the limits of evidence

In 1950, a federal grand jury in San Francisco considered whether to indict Weinberg for perjury. He had testified under oath that he had never belonged to the Communist Party and had never met Steve Nelson. The government’s case was weakened by the FBI’s illegal wiretap: its evidence was inadmissible in court, and the authorities had no other evidence linking Weinberg to the Party. By April, the Bureau had interviewed eighteen current and former Communist Party members in the San Francisco area without obtaining such a link. The grand jury did not return an indictment that year.

The Justice Department tried again in the spring of 1952, convening a second grand jury. Its additional evidence was Paul Crouch’s claim that he had seen Weinberg at a Party meeting speaking with Nelson. Prosecutors recognized that Crouch might not be reliable, but may have hoped that a trial would uncover more evidence against Weinberg—and perhaps against Oppenheimer. Weinberg, by then less overwhelmed by the investigation, refused to provide information about Oppenheimer. The renewed proceedings show how San Francisco’s investigative machinery could turn associations and disputed testimony into pressure, even when the underlying evidence remained uncertain.

San Francisco also figures in the documentary record surrounding Jean Tatlock’s death. The city’s coroner’s office produced records concerning the death, including reports that recorded acute edema of the lungs and a faint trace of chloral hydrate. The surviving death certificate did not give the exact quantity of the drug, a detail that later mattered to investigators considering whether the evidence could distinguish suicide from another cause. The surviving records therefore establish the official medical findings while leaving important questions unresolved; records from the brief formal inquest appear not to have been preserved.

A city of public consequence

Across these episodes, San Francisco gathers different scales of Oppenheimer’s history into one urban setting. The ferry, wharf bars, and Sacramento Street restaurant connect physics to friendship and everyday hospitality. The port and auditorium expose the political violence and solidarity that drew Oppenheimer and his students into public life. The grand jury and coroner’s files, in turn, represent the state’s efforts to investigate people and events through evidence that could be incomplete, contested, or unavailable. The city’s significance lies in this range: it was at once a place of social exchange, collective action, and unresolved scrutiny.