“Another influence of great moment in forming the character of the English workers is the Irish immigration already referred to. On the one hand it has, as we have seen, degraded the English workers, removed them from civilisation, and aggravated the hardship of their lot; but, on the other hand, it has thereby deepened the chasm between workers and bourgeoisie, and hastened the approaching crisis. For the course of the social disease from which England is suffering is the same as the course of a physical disease; it develops, according to certain laws, has its own crisis, the last and most violent of which determines the fate of the patient. And as the English nation cannot succumb under the final crises, but must go forth from it, born again, rejuvenated, we can but rejoice over everything which accelerates the course of the disease. And to this the  Irish immigration further contributes by reason of the passionate, mercurial Irish temperament, which it imports into England and into the English working-class. The Irish and English are to each other much as the French and the Germans; and the mixing of the more facile, excitable, fiery Irish temperament with the stable, reasoning, persevering English must, in the long run, be productive only of good for both. The rough egotism of the English bourgeoisie would have kept its hold upon the working-class much more firmly if the Irish nature, generous to a fault, and ruled primarily by sentiment, had not intervened, and softened the cold, rational English character in part by a mixture of the races, and in part by the ordinary contact of life” [Frederick Engels, The Condition of the Working-Class in England in 1844. With Preface written in 1892, 1892]