The Song Dynasty was so large and that was a factor in the empire's decline. They created so many positions within the bureaucracy and the men in those positions received a generous amount of money.
I believe the reason for this would be geographical evolution. Different ecosystems cause the finches to evolve differently over time. Also, since the finches on the Galápagos Islands are closer to the one in South America, it is likely that finches from there (South America) could have moved to the islands, contributing to the evolutionary process.
The past war crash in america occured after WW1 as the result of high inventories of manufactored goods with no local buyers and a drop-off in exports, and falling prices for farm produce
to define what kinds of scientific study can be done in Antarctica
