The historian Norman Stone, who died in June, always insisted that history students learn foreign languages. Language gives access to a people’s culture, and culture to its history. Its history tells us how it sees itself and others. Knowledge of languages should thus be an essential component of a historian’s technical equipment. It is the key to understanding the past and future of international relations. But this belief in the fundamental importance of knowing particular languages has faded, even among historians. All social sciences, to a greater or lesser degree, start with a yearning for a universal language, into which they can fit such particulars as suit their view of things. Their model of knowledge thus aspires to the precision and generality of the natural sciences. Once we understand human behavior in terms of some universal and - crucially - ahistorical principle, we can aspire to control (and of course improve) it.