In his memoirs, an ethnic entrepreneur reveals how, starting in 1911, he advocated for the liberation of the oppressed nationalities of Europe through his Nationalities Union, agitated for Lithuania's liberation from Russian rule as an agent of the Foreign Office during World War I, and ultimately had to juggle between German annexation desires and the Greater Polish plans of the Allies. His repertoire included massive propaganda campaigns, difficult proto-diplomatic negotiations, espionage, intrigues, clever fundraising, and press bribery. Particularly informative are the verbatim conversations with German, Allied, and Lithuanian politicians, diplomats, officers, emissaries, and agents, preserved due to his diary, which are often only summarized in ministerial records. This is an indispensable source reading for anyone wishing to understand the explosive power of the right to self-determination of peoples and the impact of national movements during the world war, as well as the strategy and tactics of German imperialist Eastern policy. The text, translated directly from the original copies at the Lithuanian Cultural Institute in Lampertheim, includes detailed factual and biographical commentary.