Kaspar the human

Kaspar, the human being is a comedy written by Adolf Glaßbrenner in Hamburg. It was published in 1850. The play can be called a reading drama because it is much more like a political pamphlet than a play and can be read as an aesthetic-political declaration of war. The prologue voice, which can be equated with Glaßbrenner, calls for a revolution in poetry and the state. (Source: Wikipedia)

https://volksbuehne.adk.de/deutsch/volksbuehne/archiv/spielzeitchronik/1980_bis_1990/index.html

https://de.wikipedia.org/wiki/Kaspar,_der_Mensch

https://en.wikipedia.org/wiki/Adolf_Glassbrenner