»Henning v. Tresckow. Formative Years, Intellectual Foundations, Ambivalences« Henning v. Tresckow was a shining light within the resistance against the Nazi regime. An enthusiastic supporter in the beginning he changed himself to a determined enemy, even Hitler assassin. For better comprehension of his ambivalent way detailed basic scientific research is necessary regarding to the development of his personality, consequently his social profile, habitual peculiarities, foundational experiences and intellectual genesis, finally his contradictions are subject of this study.