Read the claim for an argumentative paragraph that discusses why the chronometer was the most historically significant object in macgregor’s text. the chronometer was the most historically important artifact because it changed the face of international trade. which reason provides the strongest support for the claim? in the seventeenth and eighteenth centuries, the british were concerned with creating a clock that kept accurate time aboard sailing ships. the widespread use of the chronometer led to charles darwin’s theory of evolution and his great work on the origin of species. in 1800, thomas earnshaw made a brass chronometer that was about the size of a large pocket watch. the chronometer’s accuracy allowed explorers to create accurate maps, which meant that safe and rapid shipping routes could be created.