• “What is the Commune, that sphinx…?” Karl Marx rhetorically asked himself in his reflections on the Paris Commune. In the last decade this question has become again increasingly important to political theorists and philosophers thinking about communism. Within their debates the anarchist-communist line of thought and practice is not considered worthwhile to be reflected. That is a mistake.
    Within this chapter I reconstruct the collectively shared economy of numerous anarchist Intentional Communities as an interstitial terrain and discuss the communards’ practices in regard to three layers: firstly, in regard to the legal order, secondly, in regard to the money- and property-based economy and thirdly, in regard to the communard subjects themselves. Thereby I argue that those communes are extraordinarily strong expressions of interstitiality. By conceptualizing those communes along a practice-theoretical approach and along the anarchist concept of interstitiality new possibilities are opened for generalizing their practices beyond a small-scale.