Calls to defund the police gained prominence with the Black Lives Matter (BLM) movement and take various forms. Depending on what will be defunded, the idea has attracted support from different parts of the political spectrum. The politicized nature of the debate often cuts short reflection on how best to assess proposals to defund the police. This article takes up that task. It begins by developing a typology of defund measures: abolitionist cuts, abolitionist reallocation, disaggregative cuts, and disaggregative reallocation. It then outlines a framework to evaluate policing and defund measures, drawing on criteria from the ethics of defensive force. Since policing relies on force, it faces a high justificatory bar and must satisfy the principles of just aim, proportionality, and necessity. The state should not fund unjustified forms of policing that violate those principles. Different violations, though, demand different policy responses.
