This process, quite apart from all bonds based on shared substantive interests, will often lead to actual relations between the elements of any two—or of many—groups that have been made alike in this way. One observes this, for example, in the international sympathy that aristocrats hold for one another. To an astonishing degree, these feelings of solidarity are independent of the specific character of the individuals concerned, a matter that is otherwise decisive in determining personal attraction and repulsion.

Georg Simmel, on individuality and social…, loc. 595