Indeed, whoever opposes peaceful and necessary cooperation among the social classes is attempting, beyond doubt, to disrupt and divide human society; he menaces and does serious injury to private interests and the public welfare. 39. As Our predecessor, Pius XII wisely said, “In a nation that is worthy of the name, inequalities among the social classes present few or no obstacles to their union in common brotherhood. We refer, of course, to those inequalities which result not from human caprice but