The truth is, that the methods of English constitutional progress have been, down to this day, offensive strategy and defensive tactics. Positions have been taken up which necessitate the retirement of the forces of reaction, unless they are prepared to make attacks predestined to defeat; and so, nearly every Liberal advance has been made to appear the result of Tory aggression. The central position has always been control of the purse by parliament. At first it only embraced certain forms of direct taxation; gradually it was extended and developed by careful spade-work until it covered every source of revenue. Entrenched behind these formidable earthworks, parliament proceeded to dictate to the early Stuarts the terms of national policy. Charles I, provoked by its assumptions, made his attack on the central position, was foiled, and in his retreat left large portions of the crown's equipment in the hands of parliament. Rasher attacks by James II resulted in a still more precipitate retreat and in the abandonment of more of the royal prerogatives. The growth of the empire and of the expenses of government riveted more firmly than ever the hold of parliament over the crown; the greater the demands which it alone could meet, the higher the conditions it could impose upon their grant, until parliament determined absolutely the terms upon which the office of monarchy should be held. In a similar way the Commons used their control of the national purse to restrict the powers of the House of Lords; provocation has led to attacks on the central position, and the failure of these attacks has been followed by surrender. Prudent leaders have preferred to retire without courting the preliminary of defeat.