While the recent publication of the Hannah Arendt-Martin Heidegger correspondence confirms that there existed a close personal tie between these two thinkers, the relation between their philosophies is far more problematic. This article argues that Arendt's originality presents itself in its full light in her two major theoretical works of the 1950s, Between Past and Future and The Human Condition , when these works are considered to present a thinly veiled, implicit critique of Heidegger's philosophy. Arendt's critique becomes especially visible (...) in the 'existential' role that she attributed to natality in its relation to political action and to remembrance, placing in question the central orientation of Heidegger's existential ontology in terms of being-toward-death. (shrink)