The American Revolution, in its earlier stages at least, was not a contest between opposing governments or nationalities, but between two different political and economic systems, to each of which able and honest men then adhered, and now adhere. The motives and conduct of each party, therefore, ought to be stated with exact impartiality. It was not only inevitable, but wise, and on the whole wisely conducted in accordance with the traditions and methods of political action to which our British race had been accustomed. It was also honestly and fairly opposed by those who neither accepted revolutionary principles, nor recognized the validity of the reasons assigned for their application to the existing state of affairs. Readers of American history from the Restoration of Charles II., in 1660, to the Revolution find frequent reference to the King's Prerogatives, Navigation Laws, Acts of Trade, and in later years to Writs of Assistance, as subjects of complaint between Great Britain and her colonies; and as these were among the immediate causes of the war, they require explanation. When the Earl of Hillsborough (April 22, 1768) required the House of Representatives of Massachusetts, through Governor Bernard (June 21st), in his majesty's name, to rescind the resolution which had given birth to their Circular Letter of February 11, 1768, the order was a claim of right by the king to control the legislative action of that province; and the refusal of the House was regarded by the prerogative party both in Great Britain and in the colonies as in derogation of the king's constitutional power.