David Hawkins

David Hawkins’s importance in the account lies in the unusual range of positions he occupied: philosophy scholar, reform-minded Communist Party member, participant in Berkeley’s intellectual circles, and member of the internal security committee at Los Alamos. He knew J. Robert Oppenheimer both as a political associate and as the director whose persuasive authority could turn conflict into apparent agreement. That experience made Hawkins a close observer of the tensions between political suspicion and the practical demands of wartime scientific work.

Identity and Political Commitments

Hawkins came to Berkeley in 1936 to study philosophy. Almost immediately, he entered the circle around Oppenheimer and encountered students and researchers including Phil Morrison, David Bohm, and Joe Weinberg. His political activity grew from the university world and the labor disputes around it: after meeting Frank Oppenheimer at Stanford, Hawkins joined the Communist Party in late 1937. Like the Oppenheimer brothers and many other academics, he was angered by anti-labor vigilantism directed at California’s farm workers. His Party activity, however, remained part-time; he did not meet the full-time organizer Steve Nelson until around 1940.

Hawkins understood the risks attached to openly declaring Party membership in academic life. He later recalled that members kept their affiliation secret because disclosure could cost them their jobs. In his account, left-wing participation and public Communist identification were not interchangeable: a person might join political activity on the left while knowing that openly naming the affiliation carried professional consequences. His own politics were not directed toward revolutionary action. He described the group’s purpose as moving the New Deal leftward, a reformist objective that he considered applicable to Oppenheimer as well as himself. The account presents Hawkins’s political identity as a commitment to collective reform rather than a plan for revolution.

Berkeley Networks and Oppenheimer

By 1941, Hawkins was active in local campus politics as a junior faculty member in Berkeley’s philosophy department. He took part in study groups held in private homes with Weinberg, Morrison, and others. Their discussions centered on historical materialism and theories of history. Hawkins was particularly impressed by Morrison, and the two became close friends. The groups also sometimes met at Oppenheimer’s home, placing Hawkins within a network where academic discussion, political commitments, and personal association overlapped.

Hawkins first encountered Oppenheimer at a Teachers’ Union meeting about the hardships faced by underpaid teaching assistants. What struck him was not simply eloquence but a method of listening: Oppenheimer could gather different speakers’ arguments into a summary that made them feel they had reached agreement. Hawkins regarded this as an exceptional political talent. Years later, when asked whether Oppenheimer had belonged to the Communist Party, Hawkins said he did not know. He considered the question less important than Oppenheimer’s unmistakable identification with left-wing activities. That distinction reflects the uncertainty at the center of their political world: association and shared reformist aims were visible, while formal membership was not something Hawkins could establish.

Assistant and Laboratory Mediator

At Los Alamos, Hawkins served as Oppenheimer’s personal assistant and saw the same conciliatory skill at work among scientists. When an argument began, Oppenheimer would listen and then summarize the competing positions in a way that dissolved the disagreement. Hawkins described this as a kind of performance that earned respect even from colleagues with stronger scientific records. His observation gives practical substance to the political talent he had noticed in Berkeley: Oppenheimer did not merely persuade through force of assertion; he could make people recognize their own views in a common formulation.

Hawkins’s responsibilities also extended into the laboratory’s security structure. Under Oppenheimer’s agreement with General Groves, Hawkins joined John Manley and chemist Joe Kennedy on a three-person committee responsible for internal security. Their remit concerned security within the laboratory’s T-Section, enclosed by a second barbed-wire fence that military police and soldiers could not enter. The committee handled routine controls, including checking that scientists locked file cabinets and did not leave secret papers exposed overnight. One enforcement measure turned carelessness into a reciprocal duty: anyone found to have left a secret document out had to patrol the laboratory the next night and watch for the same breach by someone else. Hawkins’s position thus joined his past political association to the administration of secrecy, rather than leaving him outside the security system as its object.

Politics Under Security Scrutiny

That appointment itself became a source of suspicion. Captain de Silva, the laboratory’s resident West Point graduate, was profoundly suspicious of people around him, and Hawkins’s former Party membership heightened his doubts about the committee Oppenheimer had chosen. Oppenheimer nevertheless valued Hawkins and his abilities, and understood his left-wing politics as loyal and reformist, not revolutionary. The contrast matters: at Los Alamos, a political history could prompt suspicion even when the director who knew the person best regarded that history as compatible with loyalty to the United States.

Oppenheimer’s own questioning by John Lansdale shows how Hawkins’s name entered the security record. Asked about possible Party members or former members associated with the project, Oppenheimer named several people and identified Hawkins differently from those he believed had been members. He said he did not think Hawkins had belonged to the Party. This account does not resolve every uncertainty about Hawkins’s political past; it records Oppenheimer’s judgment during an inquiry in which names and affiliations had consequential weight. Hawkins appears both as a member of the security committee and as someone whose earlier politics could be scrutinized by the apparatus that committee served.

Witness to Oppenheimer’s Wartime Judgments

Hawkins also accompanied Oppenheimer during a revealing moment in Niels Bohr’s visit to Los Alamos. As the two men walked Bohr back to his quarters in Fuller Lodge, Bohr playfully tested the ice on Ashley Pond. Oppenheimer, usually the more daring of the two, worried aloud to Hawkins about what would happen if Bohr slipped through. The next day, Oppenheimer showed Hawkins a letter Bohr had written to Franklin D. Roosevelt. Hawkins understood the gesture as evidence of Oppenheimer’s hope that Roosevelt had grasped Bohr’s case for international understanding and control of atomic energy. Hawkins later recalled that the people at Los Alamos continued to live with that optimism for the rest of their time there. In this episode, he is not merely an observer of laboratory management but a confidant shown a document Oppenheimer considered precious.

That access did not mean that Hawkins or his circle could determine how the bomb would be used. During the May 1945 Target Committee discussions, Phil Morrison proposed a warning to Japan, including the possibility of leaflets if a demonstration could not be arranged. Hawkins was present when an Army officer opposed the proposal, and he later corroborated Morrison’s account: the warning was dismissed, and Morrison was given little opportunity to influence the discussion. The scene places Hawkins beside a colleague whose intervention failed, and makes visible the narrowing authority of scientists once policy and military decisions were being made. Across these episodes, Hawkins’s narrative role is that of a politically engaged witness inside the institution: he could help secure the laboratory, observe Oppenheimer’s persuasive and personal influence, and record both the hopes attached to international control and the limits of scientific dissent.