Rupert Quaderer examined the challenges of Liechtenstein at the time of the First World War until the domestic crisis of 1926. The most important publication was the three-volume work "Bewegte Zeiten" (2014). The project's objective was to accompany a small state in search for its way in a phase of domestic and foreign policy reorientation. Due to extensive research in Liechtenstein, Swiss and Austrian archives as well as in several private archives, the following assumptions were reassessed: The First World War triggered fundamental changes in the domestic and foreign policy development of Liechtenstein. The partly intense discussions about the right way of a small state led to the constitution of 1921 and to the conclusion of the Customs Treaty with Switzerland in 1923.