Historical schools were very much a product of the era where communication was difficult, so it was natural for people to be most influenced by the people aroun

Historical schools were very much a product of the era where communication was difficult, so it was natural for people to be most influenced by the people around them, particularly when people write mostly in their national languages. Some of these schools had considerable momentum, so that they persisted into the post-war era outside their original milieu (Austrian economics, say, or the Frankfurt School), but it's not something you see much of anymore.