Mapmakers
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All the good stuff about Traveling: mental, virtual and real life Maps of Worlds where no one has gone before ...
Curated by Peter Hoeve
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Trade patterns for Obsidian played key role in Maya Collapse - Mark Golitko c.s.

Trade patterns for Obsidian played key role in Maya Collapse - Mark Golitko c.s. | Mapmakers | Scoop.it
Shifts in exchange patterns provide a new perspective on the fall of inland Maya centers in Mesoamerica approximately 1,000 years ago.

   Related reading on the Obsidian Trail: http://phys.org/news164896641.html

   Related reading on Maya Collapse: http://phys.org/news/2012-02-maya-civilization-collapse-modest-rainfall.html

   For the Maya, who did not have metal tools, obsidian (or volcanic glass) was highly valued because of its sharp edges for use as cutting instruments. Maya lords and other elites derived power from controlling access to obsidian, which could be traded for important goods or sent as gifts to foster important relationships with other Mayan leaders.

   The Field Museum researchers found that prior to the fall of the Maya inland centers, obsidian tended to flow along inland riverine networks. But over time, this material began to be transported through coastal trade networks instead, with a corresponding increase in coastal centers' prominence as inland centers declined.

   The shift in trade might have involved more than obsidian. Field researcher Mark Golitko said, "The implication is that other valuable goods important to these inland centers were also slowly being cut off." Golitko led the Social Network Analysis that graphically depicts the change in trade patterns.

 
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Why I Am Leaving Goldman Sachs - Greg Smith

Why I Am Leaving Goldman Sachs - Greg Smith | Mapmakers | Scoop.it

   Greg Smith is resigning as a Goldman Sachs executive director and head of the firm’s United States equity derivatives business in Europe, the Middle East and Africa, over an integrity problem too big to ignore ...

   In a blistering takedown of his now-former employer, Smith wrote that the environment at Goldman Sachs "is as toxic and destructive as I have ever seen it." Andy Rosenthal, the Times editorial page editor, told The Huffington Post in an email that Smith "contacted us" about writing the piece. In the letter, Smith accuses Goldman Sachs of putting its own financial interests ahead of those of its clients and even singles out CEO Lloyd Blankfein and president Gary Cohn as responsible for losing "hold of the firm's culture on their watch."

The resignation letter -- aptly titled "Why I Am Leaving Goldman Sachs" -- immediately sent shockwaves through the business world and tore up the Twitterverse.

   Read more in the Huffington Post: http://www.huffingtonpost.com/2012/03/14/greg-smith-goldman-sachs-new-york-times_n_1344538.html

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