Pius XI 's successor , Pope Pius XII , did not promulgate the draft as an encyclical . Critics of Pius XII ( notably John Cornwell in his controversial work '' Hitler 's Pope '' ) cited this decision as evidence of his alleged silence toward anti-Semitism and The Holocaust . He utilized parts of it in his own inaugural encyclical '' Summi Pontificatus '' on the unity of human society , in October 1939 , the month after the outbreak of World War II , and analysis of the draft figures prominently in most comparisons of the policies of Pius XII and his predecessor
The Holocaust
The Holocaust
Humani generis unitas