That is true. By making travel on rivers more efficient.
Cocoa beans were their form of money. They were what's called "bartering", or "trading".
Hope this helps~!
~Isle of flightless Duns
William Jennings Bryan is a prominent American politician who supports anti-imperialism. He calls for a rejection of imperialism in American policy on the grounds that imperialism is directly opposed to basic American values. Specifically, he mentions that God gives every human heart the love of Liberty and any human kind regardless any level of civilization or intelligence would never want to be controlled by a foreign country. In order to point out the conflict between the ideas behind the establishment of the United States and imperial ambitions, he recalls what Lincoln said that the safety of America was built in the spirit that treasure liberty as a “heritage <span>of all men, in all lands, everywhere” and United States should never go against this spirit.</span>
It gave them the confidence to fight for their rights knowing the British would win the war if they didn't help.