What approach to democracy is best for the development of public activity and democratic life? There are two dominant perspectives about the preconditions and functions of democracy: On the one hand, the notion of democracy that departs from nihilist and relativist postulates by which the former is portrayed as a procedure to legitimize any deontic phenomenon. On the other, and in contradistinction with the procedural notion of democracy, there is the so-called militant democracy, that deems it as a form of government of, with and for the human person. This notion is key for a political regime that takes seriously human fallibility and hence, it aligns with Adorno’s imperative that Auschwitz should never happen again. This is a type of democracy that moves around the heuristic feature of human dignity to solve practical dilemmas, as shown by Habermas and Ballesteros. A democracy that is lived and portrayed as such constitutes a guarantee for a genuine development of what is public.