For a decade businesses have been implementing diversity policies. The celebration of diversity has invaded every corporate sphere - developing the notion of diversity and the practices for dealing with it “French style” : Republican equality recognises diversity but while disregarding every difference (Renaut, 2009) and transforms it into a paradoxical stipulation – to value differences by not taking them into account. This contribution is a reflection on the emergence of this notion of diversity as a managerial principle in organisations.