One of the most provocative claims in current climate ethics is that we ought to have fewer children, because procreation brings new people into existence and thereby causes large amounts of additional greenhouse gas emissions. The public debate about procreation and climate change is frequently framed in terms of the question of whether people may still have any children at all. Yet in the academic debate it is a common position that, despite the large carbon impact of procreation, it is (...) still permissible to have one or two children per couple, if having children is needed for the parents' lives to go well. In this article, we propose a defence and a principled formulation of this procreative prerogative: agents are permitted to procreate if the goods that procreation provides are essential to their lives going well and cannot be replaced by other goods, nor be realized by lower‐emissions alternatives. This principle implies that procreative decisions require case‐by‐case assessment in which agents' self‐reflection, individual circumstances, and social context play a significant role. (shrink)