Oppression is commonly deemed a problem of freedom. How though should we con-ceptualise the freedom-restricting nature of oppression? This paper aims to show that the unfreedom in oppression may be understood in terms of individual negative liberty. The controversial concept of collective unfreedom is not needed. Non-cooperation among the oppressed generates constraints on individual freedom. This non-cooperation is ultimately attributable to the exercise of social power by oppressors. It is in this sense that the resultant states of individual unfreedom are due relations of oppression. Keywords Freedom, oppression, social power, negative liberty, cooperation Berlin’s (1958/1969) metaphor for freedom was the number of doors open to a person...