Thus, apart from its constitutional implications, the book attacked the perceived interests of the English merchant class. In querying England's right to restrict Ireland's exports (internal trade was not affected), Molyneux's book was a direct attack on the mercantalist system, variations of which were common to all contemporary western European nations.
Under it the metropolis acted as an entrepôt for imperial trade, and certain staple products of various dependencies, e.g. tobacco from Virginia and linen from Ireland, received special protection within the imperial market. Problems arose when, as with Irish wool, potential exports were perceived to constitute a threat to the markets of the English merchants and producers. However, in this case improved technology, rising populations and expanding markets ensured that by the middle of the century English manufacturers were anxious to absorb all the wool available from Ireland.
By the end of the century Locke's concept expounded by Molyneux was challenged by Paine's theory of 'the Rights of Man'. But Paine's challenge was preceded by that of Francis Hutcheson, a Presbyterian, who was born in 1694 at Saintfield, Co. Down, and grew up during the Dissenter persecutions of the reign of Queen Anne. His emphasis was on the rights of people – the greatest good for the greatest numbers, – he preceded Bentham. He taught that rulers have no sacred rights other than those that arise from the consent of the people and as a corollary of this that if the mother country oppresses a colony and the colony is able to subsist as a sovereign state it is not bound to remain subject any longer.
In 1729 Hutcheson became Professor of Moral Philosophy at Glasgow University, and in this capacity he taught virtually all the ministers in the Irish Presbyterian Church between 1729 and his death in 1746. Many of his students emigrated to north America. Some taught in Benjamin Franklin's new university in Philadelphia and an influential number of their students sat in the Continental Congress. Adam Smith, Hutcheson's most illustrious student and a successor to his Chair, paid tribute to the charismatic qualities of 'my never to be forgotten teacher'. Hutcheson's influence went far and wide. For a variety of reasons, economic as well as political, the mercantalist system came under increasing pressure as the century progressed and in 1776 its philosophical justification received its most severe attack from Adam Smith, in the Wealth of Nations.