“because the decision involves the application of a not altogether precise legal standard to a combination of features of varying importance, I think that this falls within the class of case in which an appellate court should not reverse a judge’s decision unless he has erred in principle.”
“…the jurisdiction to grant an injunction, unfettered by statute, should not be rigidly confined to exclusive categories by judicial decision. The court may grant an injunction against a party properly before it where this is required to avoid injustice, just as the statute provides and just as the Court of Chancery did before 1875. The court habitually grants injunctions in respect of certain types of conduct. But that does not mean that the situations in which injunctions may be granted are now set in stone for all time. The grant of Mareva injunctions itself gives the lie to this. As circumstances in the world change, so must the situations in which the courts may properly exercise their jurisdiction to grant injunctions. The exercise of the jurisdiction must be principled, but the criterion is injustice. Injustice is to be viewed and decided in the light of today’s conditions and standards, not those of yester-year”