 Many authors prefer to talk of positive and negative freedom. This is only a difference of style, and the terms ‘liberty’ and ‘freedom’ are normally used interchangeably by political and social philosophers. Although some attempts have been made to distinguish between liberty and freedom (Pitkin 1988; Williams 2001; Dworkin 2011), generally speaking these have not caught on. Neither can they be translated into other European languages, which contain only the one term, of either Latin or Germanic origin (e.g. liberté, Freiheit), where English contains both.