[2] In 1932, he published his first book Zwischeneuropa und die deutsche Zukunft ("Inter-Europe and the German future"), followed by Deutschland in der Weltpolitik ("Germany in World Politics") in 1933.
He continued to write for Die Tat in association with other right-wing figures such as Hans Zehrer, Ferdinand Zimmermann, and Ernst Wilhelm Eschmann.
In October 1933, at the suggestion of Heinrich Himmler, he was appointed Head of Policy at the Münchner Neueste Nachrichten ("Munich's Latest News").
Also in 1934, Wirsing became an Anwärter, or candidate, for the Schutzstaffel (SS), and began working as an informant for the Nazi intelligence agency Sicherheitsdienst (SD).
He also worked as a consultant for the cultural policy department of the Federal Foreign Office, for which he wrote anti-Bolshevik language regulations until the end of World War II.
Wirsing gave a lecture at the Frankfurt opening of the Alfred Rosenberg-led Institute for Study of the Jewish Question on March 27, 1941.
[3] He published his view of the government and culture of the United States in his 1942 book Der maßlose Kontinent (The Excessive Continent).
The book contrasted the American system, which he believed was manipulated by Jewish influence, with a proposed "new world order" in the form of a German-dominated European hegemony.
He became its editor-in-chief in 1954; despite protests from the Social Democratic Party of Germany, including politicians Herbert Wehner and Willy Brandt, he held that position until 1970.
[12] On April 16, 1959, Wirsing published an article in Christ und Welt which described a man he felt was "a second Albert Schweitzer" working in a remote area of Ghana, in West Africa.