The list of publications by Professor Jerzy W. Borejsza in 1958-2018, with about 350 entries, over a dozen of books among them, shows two main areas of interest. The first is the history of Polish political emigres, European emancipation movements and 19th- Century socialism. The phrase coined by Borejsza – “The Beautiful 19th Century” – which became known in Polish historiography, – illustrates his fascination with the history of this period. He was especially interested with histories of Polish left-wing movements, the insurgents, emigres and deportees, who had fought for “The Polish Cause”. He wrote extensively about them, publishing initial studies and complete biographies. In the 1970s, apart from continuing various topics from 19th Century, he started to study the Italian Fascism, in time expanding his interest to Fascist movements and authoritarian regimes of Central, Eastern and Southern Europe, National Socialism in Germany and Stalinism in the Soviet Union. He became the pioneer of reflection ranging beyond the genocidal policies and moral nihilism of the Third Reich, basing on ever-perfected definitions of Fascism, authoritarianism and totalitarianism. Arguably the most original contribution of Jerzy W. Borejsza to the scholarship of the “Century of Destruction” was identifying and describing the anti-Slavic views of Adolf Hitler.