EN
The aim of the first part of the paper is to make the reader acquainted with the selected parts of Váross’s large study of fanaticism (Le Fanatisme. Une analyse psychologique et axiologuiqe; Paris: Sorbonne 1947, 541 pp.). The second part deals with two contemporary most expanded kinds of fanaticism: political and ideological ones as two distinctive kinds of rationality. Attention is paid also to several parallels between political fanaticism and ideological fanaticism, as they are defined by M. Váross, and as conceived by H. Arendt.