It was during these years that he wrote his famous text A survey of modern algebra with G Birkhoff which was published in 1941. Kaplansky writes in about this text:
Ito ay sa panahon ng mga taon na siya wrote kanyang tanyag na teksto ng isang pagsisiyasat ng mga modernong algebra sa G was Birkhoff na-publish sa 1941. Kaplansky magsusulat sa tungkol sa text na ito: