because usually people had an easier time going on estalished trail like the silk road it was dangerous but they used it up until the 15th century and it takes longer to make a new trail
GDP is important because it is a leading indicator of a country's economic health. It gives economists an idea of the nation's financial viability. <span>The GDP calculates the economic value of all produced goods and services generated by the country. Keeping track of it you would know or maybe predict the future trends of the economy of a country. Hope this answers the question.</span>
Without suffering of.....