[1] In 1913, he joined the municipal bond department at Boston-based investment bank Lee, Higginson & Co. but in 1915 returned to education as a graduate student in social sciences, philosophy, and jurisprudence at Harvard College.

Between 1918 and 1921 he was an aide to Justice Louis Brandeis and the Zionist Organization of America on international problems of the Middle East and the World War I peace conference.

In July 1939, atomic physicists Leo Szilard and Eugene Wigner approached Albert Einstein to seek his help in communicating with the government of Belgium.

At the time, the goal was not yet to press for an American atomic bomb project, but to prevent the Nazi government in Germany from developing their own.

(These events, which would prove so fateful for the world at large, have been examined minutely by historians - some accounts credit Sachs with the idea of approaching Einstein in the first place.

Working with Sachs, Szilard re-drafted the appeal to include a request for the government to help obtain funding and support for American atomic research.

[6] Sachs's own accounts of his meetings with Roosevelt are recounted in Brighter Than A Thousand Suns, Robert Jungk's seminal history of the development of atomic science.

Sachs managed to get an invitation to breakfast the next morning, and spent a sleepless night trying to conceive how he might persuade the president to support the plan.

This seemed to the great Corsican so impossible that he sent [Robert] Fulton away.... Had Napoleon shown more imagination and humility at that time, the history of the nineteenth century would have taken a different course.