The stamp act was only evidence of a vigorous colonial policy, which was to make the people of the colonies contribute directly to their own defence and security, and at the same time enforce the navigation laws and acts of trade and put an end to the general system of smuggling by which men, some of the best known merchants of Boston, had acquired a fortune. George Grenville, who was responsible for the rigid enforcement of the navigation laws and the stamp act, had none of that worldly wisdom which Sir Robert Walpole showed when, years before, it was proposed to him to tax the colonies. "No," said that astute politician, "I have old England set against me already, and do you think I will have New England likewise?" But Grenville and his successors, in attempting to carry out a new colonial policy, entirely misunderstood the conditions and feelings of the colonial communities affected and raised a storm of indignation which eventually led to independence. The stamp act was in itself an equitable measure, the proceeds of which were to be exclusively used for the benefit of the colonies themselves; but its enactment was most unfortunate at a time when the influential classes in New England were deeply irritated at the enforcement of a policy which was to stop the illicit trade from which they had so largely profited in the past. The popular indignation, however, vented itself against the stamp act, which imposed internal taxation, was declared to be in direct violation of the principles of political liberty and self-government long enjoyed by the colonists as British subjects, and was repealed as a result of the violent opposition it met in the colonies. Parliament contented itself with a statutory declaration of its supremacy in all matters over every part of the empire; but not long afterwards the determination of some English statesmen to bring the colonies as far as practicable directly under the dominion of British law in all matters of commerce and taxation, and to control their government as far as possible, found full expression in the Townshend acts of 1767 which imposed port duties on a few commodities, including tea, imported into those countries. At the same time provision was made for the due execution of existing laws relating to trade. The province of New York was punished for openly refusing to obey an act of parliament which required the authorities to furnish the British troops with the necessaries of life. Writs of assistance, which allowed officials to search everywhere for smuggled goods, were duly legalised. These writs were the logical sequence of a rigid enforcement of the laws of trade and navigation, and had been vehemently denounced by James Otis, so far back as 1761, as not only irreconcilable with the colonial charters, but as inconsistent with those natural rights which a people "derived from nature and the Author of nature"--an assertion which obtained great prominence for the speaker.