A cikin 1940s ya yi aiki a kan littafinsa na farko,'' Phenomenology and Dialectical Materialism''.
Tabbas, wani nau'i mai rikitarwa na jumla shine "Ta hanyar 1940s ya yi aiki a kan littafinsa na farko,'' Phenomenology and Dialectical Materialism ', kuma ra'ayoyinsa sun sami wasu kudade a tsakanin manyan masana falsafa na Faransa. "