Many people today are concerned about the implications of climate change for their personal reproductive decisions. Some have transformed such concerns into activism by engaging in a “birth strike” and publicly announcing their decision not to procreate because of climate change. This article draws on Hannah Arendt to examine the political meaning and significance of birth strikes. It makes three basic points. First, by highlighting the human condition of being born, what Arendt called natality, birth strikes have illuminated a distinctive set of threats and possibilities for climate politics. Second, due to modern consumerism and instrumentalism, which Arendt saw as the dominance of labor and work over action, birth strikes have been misperceived as advocating a reduction in personal carbon footprints and global population growth. Third, birth strikes have clarified some of the challenges for efforts to link the individual and collective dimensions of climate responsibility.