This article deals with the little-known liberal-democratic apologist for terrorism,
Karl Heinzen. In the middle of the nineteenth century, Heinzen struggled with
combining a classical tyrannicidal discourse with modern systemic conditions.
His work points toward a later language of terrorist legitimization. The aim of the
article is to situate and substantiate the emergence of the terrorist language in its
pro-democracy context and to explore what a “violent” language is.