““The feeling of solidarity is the leading characteristic of all animals living in society. The eagle devours the sparrow, the wolf devours the marmot. But the eagles and the wolves respectively aid each other in hunting, the sparrow and the marmot unite among themselves against the beasts and birds of prey so effectually that only the very clumsy ones are caught. In all animal societies solidarity is a natural law of far greater importance than that struggle for existence, the virtue of which is sung by the ruling classes in every strain that may best serve to stultify us.””