He supported an alliance with Soviet Union and after the war he continued to work as historian in People's Republic of Poland and headed Western Institute that studied former Polish territories recovered from Germany and history of Polish-German relations.

[2] In 1921, Wojciechowski began studying at the Jan Kazimierz University in Lwów, which had then just been re-incorporated in the re-created Polish state (now Lviv in Ukraine).

[3] In 1925, he moved to Poznań, where he first was the deputy holder of the chair for the history of the political system and Ancient Polish law at Adam Mickiewicz University (UAM).

[5] In 1934 he founded the "League of Young Nationalists" (Związek Młodych Narodowców), whose aim was the foundation of an authoritarian, homogenous Polish state,[6] and became its chairman until 1937.

[11] According to Tomasz Kenar he was alarmed by Hitler's expansionism but accepted the "Anschluss" of Austria, hoping that it would put Italy against Nazi Germany and into the sphere of Polish alliance.

[12] Wojciechowski envisioned a Polish-led block in Central Europe composed of Hungary, Romania, Finland, Estonia, Latvia and Lithuania and in close relationship with Italy, that would oppose both German expansionism and Soviet pressure on these states; he wrote that such alliance would "rescue Christianity" from the threat of "Bolshevik communism" and "hitlerite paganism".

[13] Later on he focused his attention towards Fascist Italy, due to his interest in a "strong state", "depending on legal norms, in tradition of Roman law".

[11] While nation was for Wojciechowski at time the "greatest good" he didn't exhibit racist ideas or anything that would be similar to German "volkisch" elements in his works.

[14] During Nazi German occupation of Poland he along with his family sheltered a Jewish woman and in a 1945 publication he condemned the mass murder of Jews by Nazi Germany during the war as "monstrous"[15][16] Wojciechowski is described as a co-initiator of the Polish "Western thought" (myśl zachodnia),[11] a "mirror image of the German Ostforschung with a pinch of pan-Slavic sentiment thrown in".

The Polish researchers rejected the state model found in Germany, and preferred Francoist Spain or Salazar's Portugal, remaining distrustful of Hitler.

[19] During the occupation of Poland in World War II, he was involved with the Polish underground authorities, teaching at the Uniwersytet Ziem Zachodnich ("University of the Western Territories", a part of the necessary underground education system) necessary, as all Poles were forbidden basic schooling as part of German genocide regarding Polish nation.

[21][22][23] As part of conspiracy during Nazi German occupation he was one of the founding members of Ojczyzna-Omega, a conspiracy movement that gathered surviving (as Germans carried out systematic extermination of Polish educated classes) Polish intellectuals, priests, journalists, lawyers and teachers, who organised charity work, secret education and worked on concepts of post-war Poland; most of the members were Christian democrats and National Democrats.

[30] Conversely Wojciechowski's concept aided the governmental demand to legitimize the Polish acquirements in the West[31] In 1945 his book "Poland-Germany.

Wojciechowski described his view of the post-war situation:[1] "There is a new epoch of Slavic march to the west that has replaced the German Drang nach Osten.

In Poland Zygmunt Wojciechowski is recognised today as exceptional historian, and one of people who formed Polish intellectual elites.