Los Alam­os Nation­al Lab D Bldg, Boil­er House, M and V build­ings. Unit­ed States Depart­ment of Ener­gy, pub­lic domain, via Wiki­me­dia Commons

Nav­i­gat­ing Jew­ish iden­ti­ty today can feel like solv­ing a rid­dle: what is three thou­sand years old, thrives on tra­di­tion, is com­pli­cat­ed by polit­i­cal alle­giance, and exists on a spec­trum between the­o­log­i­cal and secular?

My nov­el, The Sound of a Thou­sand Stars, was inspired by my Jew­ish grand­par­ents’ lega­cy. The sto­ry pre­dates the found­ing of Israel, its his­to­ry of con­flict, and the cur­rent war. Trav­el­ing back in time may not solve today’s polar­iza­tion, but it can demys­ti­fy how we arrived here.

It all began in the sum­mer of 1944, when at only twen­ty-six, my grand­fa­ther, Leon Fish­er, signed on to con­tribute to top-secret research that, unbe­knownst to him then, would help to build the atom­ic bomb. As a result of his nec­es­sary iso­la­tion dur­ing his time at Los Alam­os, he lost all com­mu­ni­ca­tion with his Ortho­dox Jew­ish family.

A young PhD just at the onset of his career, Leon was recruit­ed not long after grad­u­at­ing UC Berke­ley, where he’d enrolled in a class taught by J. Robert Oppen­heimer. There, Oppie, as Leon knew him, had gained a rep­u­ta­tion for lec­tur­ing with his head in the clouds, mum­bling in San­skrit, and form­ing risky asso­ci­a­tions. Like many lib­er­al-lean­ing sec­u­lar Jews, Oppie was attract­ed to com­mu­nist ide­olo­gies, and these attach­ments would ulti­mate­ly result in his secu­ri­ty clear­ance being revoked in 1954.

To Leon, whose Ortho­dox fam­i­ly had emi­grat­ed from Roma­nia to escape per­se­cu­tion, Oppie defied what it meant to be Jew­ish. Despite the quo­tas on fac­ul­ty posi­tions for Jews, he held a pres­ti­gious assis­tant pro­fes­sor­ship and estab­lished the country’s pre­dom­i­nant school of thought on the­o­ret­i­cal physics. Oppie didn’t keep kosher. He dined at opu­lent steak­hous­es, often treat­ing his grad­u­ate stu­dents to meals Leon could nev­er have afford­ed, sur­round­ed by shim­mer­ing cut­lery. As oth­ers have not­ed in Oppie’s biogra­phies, he strut­ted around cam­pus with such ener­gy that his feet bare­ly hit the ground. The laws of physics them­selves seemed unable to touch him.

But in the decades of my life, in our liv­ing room, she was as tightlipped as my grand­fa­ther. We knew bet­ter than to ask, chew­ing silent­ly at the din­ner table.

In Los Alam­os, Leon, the man I knew sim­ply as Zaide, worked on the plu­to­ni­um trig­ger of the Fat Man bomb, set­ting off dyna­mite behind blast walls and study­ing sparks and igni­tion. I only know this now, after sift­ing through the con­tents of my grand­par­ents’ safe-deposit box and seek­ing out their still-liv­ing friends before they, too, passed away. My grand­par­ents made the deci­sion nev­er to speak of their time at Los Alam­os, even to us, their own fam­i­ly. I have spent years unearthing the metic­u­lous­ly scrubbed details of their lives, specif­i­cal­ly the thir­ty-six months encom­pass­ing 1944, 1945, and 1946.

I pored over my grand­moth­er Phyllis’s let­ters from Los Alam­os. In them, she recounts hav­ing blind­ly fol­lowed Leon up the wind­ing switch­backs to the iso­lat­ed, top-secret mesa. Despite the ten­sion it put on their mar­riage, my grand­fa­ther nev­er shared what he was work­ing on with her. Sto­ical­ly, he report­ed to work inside a barbed wire – enclosed area, enter­ing a top-secret steel lab­o­ra­to­ry known only as Project Y.” Phyl­lis, whose life was con­sumed by the red, rocky mesa, swal­lowed her questions.

That all changed one after­noon when she pieced togeth­er what Leon was build­ing. When she was preg­nant with her sec­ond child, the two were debat­ing baby names. Jok­ing­ly, Phyl­lis sug­gest­ed Atom­ic.” My grand­fa­ther stormed out of the room. Appar­ent­ly, Atom­ic Fish­er” had been too close to Atom­ic Fis­sion.” But even after they con­front­ed the truth of his work, secre­cy for­bade fur­ther dis­cus­sion. Phyl­lis went on to deliv­er a jaun­diced and col­icky baby. She blamed her depres­sion — a con­vic­tion she record­ed in diary entries, where she cit­ed her guilt over their con­tri­bu­tions to the weapon that changed the world: The specter of the mush­room cloud would fol­low us wher­ev­er we went.”

In 1985, Phyl­lis pub­lished a book of her let­ters that was trans­lat­ed into Japan­ese. But in the decades of my life, in our liv­ing room, she was as tightlipped as my grand­fa­ther. We knew bet­ter than to ask, chew­ing silent­ly at the din­ner table.

Since they’ve passed away, I’ve man­aged to scrape togeth­er a fog­gy vision of the com­mu­ni­ty in which they resided on the mesa — a con­glom­er­ate of Jew­ish non­be­liev­ers who still went through the motions of cel­e­brat­ing High Holy Days behind barbed wire because tra­di­tion is tra­di­tion. With six-day work­weeks elim­i­nat­ing the pos­si­bil­i­ty of obser­va­tion of the Sab­bath, my grand­par­ents attend­ed ad hoc ser­vices at Fuller Lodge. Phyl­lis wrote humor­ous­ly about the fla­vor­less mat­zo shipped up the hill in flatbeds, and her attempt to direct the non-Jew­ish vol­un­teers who mis­in­ter­pret­ed the mat­zo ball soup recipe, for­go­ing chick­en broth and instead float­ing mat­zo balls in warm tap water.

For the mem­bers of Jew­ish Ser­vices Com­mit­tee, who worked so dili­gent­ly to find workarounds to smug­gle prayer books and rab­bis into the secret city, it must have felt sur­re­al to gath­er around the com­mon-room radio and debate con­spir­a­cy the­o­ries about Hitler’s miss­ing remains — find­ing out by turns that he had per­haps ingest­ed cyanide and died by sui­cide, or been killed by an explod­ing shell in his Berlin chan­cellery, or was flee­ing by U‑Boat to Japan. Like­wise, it must have hit dif­fer­ent­ly for Leon in the days and weeks that fol­lowed. With Hitler dead and gone, he must’ve won­dered who their new tar­get might be.

The specter of the mush­room cloud would fol­low us wher­ev­er we went.”

My grand­fa­ther was simul­ta­ne­ous­ly proud of and wound­ed by his Jew­ish her­itage. Phyl­lis had nev­er been Jew­ish enough” for his fam­i­ly. At their wed­ding, Leon’s par­ents had gaped at the plat­ed creamed chick­en, unable to con­sume the mix­ture of milk and meat. A San Fran­cis­co De Young, Phyl­lis was so Amer­i­can­ized she cel­e­brat­ed Christ­mas. But my zaide knew that across the Atlantic, no such dis­tinc­tion would be made for her. At the height of the war, the rumors of Jews being turned into soap and lamp­shades cer­tain­ly influ­enced his choices.

As a child, I remem­ber being con­fused by the mul­ti­far­i­ous nature of Jew­ish iden­ti­ty. I watched my moth­er, who nev­er ate a bite of pork in her life, hide cans of clam chow­der any time my pater­nal grand­moth­er came to vis­it. Some­one could be too Jew­ish and not Jew­ish enough at the same time. So, what might it mean to be Jew­ish in Amer­i­ca today?

Beside me, my three-year-old rolls mat­zo balls between sticky fin­gers as we pre­pare to drop them in boil­ing water. I haven’t solved this rid­dle and like­ly nev­er will. But what could be more Jew­ish than ask­ing questions?

Rachel Rob­bins received her MFA from the School of the Art Insti­tute of Chica­go. She is a tenured assis­tant pro­fes­sor at Mal­colm X Col­lege, one of the City Col­leges of Chica­go. A visu­al artist and two-time Push­cart Prize – nom­i­nat­ed writer, her paint­ings have mate­ri­al­ized on pub­lic tran­sit, children’s day­care cen­ters, and Chicago’s Mag­nif­i­cent Mile. She lives in Chica­go with her hus­band, chil­dren, and Por­tuguese Water Dog. The Sound of a Thou­sand Stars is loose­ly based on her grand­par­ents, who worked at Los Alam­os but nev­er spoke of their time there.