ABSTRACTIn an article in Encounter, Antony Flew usefully opens up the issue of what racism is by giving three ‘concepts’: (1) ‘unjustified discrimination’; (2) ‘heretical belief; and (3) ‘institutionalised racism’. He rejects senses (2) and (3) in favour of (1) and finds much ‘anti‐racism’in fact guilty of it. This article, while benefiting from Flew's account, argues that it basically misconceives and underestimates racism by ignoring its complex ideological (sense 2) and institutional (sense 3) character. In regard to (2) it is argued that we need to distinguish scalar and statistical claims from the binary ‘us/them’essentialism characteristic of racism. In regard to (3) it is argued both that affirmative action is required by justice and that it entails ‘collateral injustice’as well as