Ka kammala wannan jumla: Wataƙila yadda Steinbeck ya yi hulɗa da marubuta masu ra'ayin hagu, 'yan jarida, da kuma manyan 'yan ƙungiyar kwadago ne ya sa ya rubuta waɗannan littattafan. Ya shiga kungiyar marubuta ta Amurka, kungiyar Kwaminisanci, a 1935. Steinbeck ya jagoranci marubucin marubuta Lincoln Steffens da matarsa Ella Winter. Ta hanyar Francis Whitaker, memba na Jam'iyyar Kwaminis ta Amurka John Reed Club don marubuta, Steinbeck ya sadu da masu shirya yajin aiki daga Ma'aikata na Ma'aikata da Ma'aikata na Ma'aikata. A shekara ta 1939, ya sanya hannu a wata wasika tare da wasu marubuta don tallafawa
Soviet mamaye Finland da kuma Soviet-kafa mariƙin gwamnati.