The Department of Pure and Applied Philosophy is concerned with classical philosophical issues and their anomalies.

The main topics of investigations are the question of God, the essence and meaning of sexuality in relation to the absolute and evil, theonthology with psychoanalysis. The Department actively cooperates with other NSK groups.

The representative for the philosophical branch of NSK is Peter Mlakar, a philosopher and writer. Peter Mlakar is best known for his speeches concerning religion and his very particular view on the manifestations of evil in our contemporary society.
His early speeches have been collated and published as REDEN AN DIE DEUTSCHE NATION (Speeches to the German Nation; Vienna: Verlag Turia & Kant, 1993). He has also published three philosophical works in the Slovenian language, SPISI O NADNARAVNEM (Essays on the Supernatural; Ljubljana: Analecta, 1992), UVOD V BOGA (An Introduction to God; Ljubljana: Zalozba NSK, 1997, and published in Croatian, Zagreb 2000), and HRIBI IN DOLINE (Hills and Valleys; Zalozba NSK, 1999).

As one might expect, Mlakar’s style is declarative and bombastic, but his form of rhetoric also illuminates existential conundrums of the sort that most people prefer not to be confronted with. In response to Essays on the Supernatural, a well-known Slovenian Catholic philosopher remarked that such a work "cannot be opposed with counter-argument, but only with prayer and fasting."