This paper proposes to address an ontological research about current democracies. In particular, the starting point is an exegesis on temporality, in the way temporality unfolds in Western societies. In order to study and face our political crisis, it is probably fundamental to rethink the being of the time, and to realize (with Nietzsche, Heidegger or Lyotard, who are some of the most important philosophers who have thought and related both aspects: time and crisis) that perhaps the authentic crisis takes place as an ontological "pulse", on a temporal level, like an "arrhythmia". In dialogue with three mentioned authors, this paper studies several cases of our civilization's arrhythmias or "diseases of temporality".