Answer: Until this century, relative dating was the only technique for identifying the age of a truly ancient object. By examining the object's relation to layers of deposits in the area, and by comparing the object to others found at the site, archaeologists can estimate when the object arrived at the site. Hope this helps!
I think they stopped slavery in some way, I cannot remember because it was a while ago so I would wait for a more confident response.
Mark Atwood Lawrence
As he surveyed East Asian affairs in the first months of 1899, Secretary of State John Hay saw few reasons for optimism. America's main rivals for influence in that part of the world—Russia,Japan, Germany, France, and Great Britain—bristled with imperial ambition as China, weakened by war and rebellion, steadily lost its capacity to resist them. The great powers laid claim to special privileges in various parts of the country, a process that recalled the subjugation of Africa and suggested that China might be similarly partitioned. What worried Hay most was the prospect that the United States would be shut out of this new scramble as the Europeans and Japanese, with strong footholds in the area and a far greater taste for territorial conquest, divided up China and protected their new possessions with impenetrable barriers to American trade. Like many of his contemporaries, Hay imagined China as a vital and nearly limitless market for the burgeoning output of America's rapidly industrializing economy. By 1899 the United States had made little progress toward realizing that dream, but the vision beckoned powerfully. Preserving access to the China market ranked high on the McKinley administration's foreign policy agenda even as the prospects seemed to dim.
