Historians, at some point, have dealt with questions of the
causes of the subject matter they study, whether those entities are persons, events, ideas,
or political states. The historian, Edward Hallett Carr, wrote, "The study of history is...
Research work reported in the literature has demonstrated that tree-rings record past climatic events as the relationship between tree-ring widths and variations in climate (temperature and precipitation) can be modeled. Therefore, tree-rings are...
