Conforme

«One of the most striking regularities of human society is localized conformity. Americans act American, Germans act German, and Indians act Indian. At one school teenagers take drugs, but at another they “just say no”. English and American youths enthusiastically enlisted to fight in World War I, but pacifist sentiments prevailed prior to World War II and in the 1960s.»

A theory of fads, fashion, custom and cultural changes as informational cascades, Bikhchandani, Hirschleifer e Welch