The work contains a systematic presentation of the life and work of Daniel Uvanović. The first, to be presented is a survey of the up-till-now published texts about Uvanović, which describe him as a journalistic-scientific publicist and a scientist. The information about him has been collected by means of the systematic research of the intact archival materials. It is the matter of the data from the Archives of the Faculty of Humanities and Social Sciences in Zagreb, archival materials of the Croatian Journalists’ Association, Croatian National Archives and the National Achieves in Zagreb. The texts and polemics of Uvanović are presented in Hrvatska Straža, dealing with scientific issues. His philosophic attitudes have been specially described; as for instance, the principles of causality and free will and the attitudes exposed in his articles in various journals. At the end, there is published the first attempt of completing his authorial bibliography.