So it is in the earliest texts. Scott, following some later editions, prints 'unhappily.' But this misses the point of Swift's sarcasm. Swift would certainly consider that universal acquiescence in authorized dogma with respect to the invisible would contribute to the 'happiness' of humanity. But writing on behalf of the madmen, he naturally considers that the attainment of this happiness would be far from desirable from the madmen's point of view, and takes credit to them for preventing it.