Adam Smith wrote in his 1776 publication entitled -“Inquiry into the Nature and Causes of the Wealth of Nations”, “As by means of water-carriage a more extensive market is opened to every sort of industry than what land-carriage alone can afford it, so it is upon the sea-coast, and along the banks of navigable rivers, that industry of every kind naturally begins to sub-divide and improve itself, and it is frequently not till a long time after that those improvements extend