Julian Schwinger was already the world's leading nuclear theorist when
he joined the Radiation Laboratory at MIT in 1943, at the ripe age of
25. Just 2 years earlier he had joined the faculty at Purdue, after a
postdoc with OppenheimerinBerkeley, andgraduatestudyatColumbia.
Anearlysemester at Wisconsin had con?rmed his penchant to work at night,
so as not to have to interact with Breit and Wigner there. He was to
perfect his iconoclastic 1 habits in his more than 2 years at the Rad
Lab. Despite its deliberately misleading name, the Rad Lab was not
involved in nuclear physics, which was imagined then by the educated
public as a esoteric science without possible military application.
Rather, the subject at hand was the perfection of radar, the beaming and
re?ection of microwaves which had already saved Britain from the German
onslaught. Here was a technology which won the war, rather than one that
prematurely ended it, at a still incalculable cost. It was partly for
that reason that Schwinger joined this e?ort, rather than what might
have appeared to be the more natural project for his awesome talents,
the development of nuclear weapons at Los Alamos. He had got a bit of a
taste of that at the "Metallurgical Laboratory" in Chicago, and did not
much like it. Perhaps more important for his decision to go to and stay
at MIT during the war was its less regimented and isolated environment.