Collapse_ How Societies Choose to Fail or Succeed - Jared Diamond [130]
Compounding the mystery, the Vikings shared Greenland with another people, the Inuit (Eskimos), whereas the Iceland Norse had Iceland to themselves and faced no such additional problem to compound their own difficulties. The Vikings disappeared, but the Inuit survived, proving that human survival in Greenland was not impossible and the Vikings’ disappearance not inevitable. As one walks around modern Greenland farms, one sees again those same two populations that shared the island in the Middle Ages: Inuits and Scandinavians. In 1721, three hundred years after the medieval Vikings died out, other Scandinavians (Danes) came back to take control of Greenland, and it was not until 1979 that Native Greenlanders gained home rule. I found it disconcerting throughout my Greenland visit to look at the many blue-eyed blond-haired Scandinavians working there, and to reflect that it was people like them who built Hvalsey Church and the other ruins that I was studying, and who died out there. Why did those medieval Scandinavians ultimately fail to master Greenland’s problems while the Inuits succeeded?
Like the fate of the Anasazi, the fate of the Greenland Norse has often been laid to various single-factor explanations, without agreement being reached as to which of those explanations is correct. A favorite theory has been climatic cooling, invoked in overschematic formulations approximating (in the words of archaeologist Thomas McGovern) “It got too cold, and they died.” Other single-factor theories have included extermination of the Norse by the Inuit, abandonment of the Norse by mainland Europeans, environmental damage, and a hopelessly conservative outlook. In fact, the Greenland Norse extinction is a richly instructive case precisely because it involves major contributions of all five of the explanatory factors that I discussed in the introduction to this book. It is a rich case not only in reality, but also in our available information about it, because the Norse left written accounts of Greenland (whereas the Easter Islanders and Anasazi were not literate), and because we understand medieval European society much better than we understand Polynesian or Anasazi society. Nevertheless, major questions remain about even this most richly documented pre-industrial collapse.
What was the environment in which the Greenland Norse colonies arose, thrived, and fell? The Norse lived in two settlements on Greenland’s west coast somewhat below the Arctic Circle, around latitudes 61 and 64 degrees north. That’s south of most of Iceland, and comparable to the latitudes of Bergen and Trondheim on Norway’s west coast. But Greenland is colder than either Iceland or Norway, because the latter are bathed by the warm Gulf Stream flowing up from the south, whereas Greenland’s west coast is bathed by the cold West Greenland Current flowing down from the Arctic. As a result, even at the sites of the former Norse settlements, which enjoy the most benign climate in Greenland, the weather can be summed up in