::this seems like quibbling. unique can be used in the world loosly in many senses. It was unique in being founded on the day it was founded, for example, or in having the exact mix of jews and non-jews it may have had. But in terms of an encyclopedia, which tries to be accurate, it's a much stronger claim than the evidence warrants. If it was not the only organization if its kind, it is not unique it any real sense. to say it was unique as being the only Jewish rescue group formed by the right wing, as Boodles says, may well be accurate, but could be read in a much more  negative sense than I think he intends. Best to not use the word. Its hardly critical to the point. ''''''