After the Ming empire made silver central to exchange, reduced access to silver in the first half of the 17th century contributed to a cash crisis by the mid-1640s.

“Trade is no longer trans-Eurasian or even transatlantic. It's transglobal. The networks now affect everybody at some point along the line. And the Ming found that out in the mid-1640s when there was a cash crisis having fully...”

“transferred the basis of exchange in their empire to silver when access to silver was cut off or at least minimized for a number of reasons during the first half of the 17th century the Ming at the worst possible time with the Manchu at the gates could no longer fund their armies they couldn't pay to put a military in place to hold them off so the Manchus moved in at a moment of supreme advantage blew out the Ming and replaced them as the”