Terry Macdonald

1 Introduction: The Normative Issues One of the many significant impacts of anthropogenic climate change now attracting philosophical attention is the changes it causes to patterns of human movement—within and across state borders. Impacts of climate change on individuals' and communities' decisions to move are notoriously difficult to trace or quantify, given the complex chains of causation and mixed motives that are typically involved (Boas et al. 2019).