This paper breaks with the sociological notion of ‘risk society’ and argues in favour of a philosophical view that sees the two planetary threats of late modernity, nuclear weapons and global warming, as ultimate challenges to morality and politics rather than risks that we can take and manage. The paper also raises the question of why we should feel responsible for the effects of these two global challenges on future generations and in this sense elaborates on the transgenerational chain of (...) parenthood rather than on considerations of justice. (shrink)