German: Die auf Nacktkultur zielende Bewegung ist jetzt eine weit verzweigte und hat, wie solche Bewegungen in der Regel, einen wohlberechtigten Kern In subsequent years, Ungewitter published further books advocating nudism.

Both Nackt and his Nacktheit und Kultur (Nudity and Culture, published 1911) were the subject of legal disputes lasting several years, in which, however, he was largely able to obtain satisfactory judgements.

[6] By his own account, he had suffered from infections, weakness, and a recurring rash despite medical treatment, and only become healthy and strong after, under the influence of Louis Kuhne's theories, he gave up alcohol and smoking and became a vegetarian; ultimately he adopted a raw food diet in addition to exercising and writing in the nude.

[7] Ungewitter founded his first organization, the Vereinigung für hygienische, ethische und ästhetische Kultur (Society for Hygienic, Ethical and Esthetic Culture) in Stuttgart around 1906.

[9] In its regular publication Vertrauliche Mitteilungen (Confidential Reports), members advocated naked bathing free of embarrassment, nudity without being disturbed, and to some extent, long-distance nude hiking.

As early as 1910, he had written in Nacktheit und Kultur: If every German woman saw a naked Germanic man more often, so many would not run after exotic alien races ... for the sake of healthy reproductive selection I therefore demand nudism, so that the strong and healthy will mate, but weaklings will not succeed in reproducing.German: Würde jedes deutsche Weib öfter einen nackten germanischen Mann sehen, so würden nicht so viele exotischen fremden Rassen nachlaufen […] Aus Gründen der gesunden Zuchtwahl forde ich deshalb die Nacktkultur, damit Starke und Gesunde sich paaren, Schwächlinge aber nicht zur Vermehrung kommen.

[10] Ungewitter was unusual among naturists in making a close connection between nudism, marriage, and racialism, and advocated compulsory nudity (nude exercises three times a day) together with vegetarianism.

In 1919 he had edited Der Zusammenbruch: Deutschlands Wiedergeburt durch Blut und Eisen, which lays out a program for Germany's recovery from the defeat of World War I in which compulsory nudity is an element.