After 1713 there was a comparatively long interval of peace between Britain and France, but it was occupied by an acute commercial rivalry, in which, on the whole, the French seemed to be getting the upper hand. Their sugar islands in the West Indies were more productive than the British; their traders were rapidly increasing their hold over the central plain of North America, to the alarm of the British colonists; their intrigues kept alive a perpetual unrest in the recently conquered province of Acadia; and away in India, under the spirited direction of Francois Dupleix, their East India Company became a more formidable competitor for the Indian trade than it had hitherto been. Hence the imperial problem presented itself to the statesmen of that generation as a problem of power rather than as a problem of organisation; and the intense rivalry with France dwarfed and obscured the need for a reconsideration of colonial relations. At length this rivalry flamed out into two wars. The first of these was fought, on both sides, in a strangely half-hearted and lackadaisical way. But in the second (the Seven Years' War, 1756-63) the British cause, after two years of disaster, fell under the confident and daring leadership of Pitt, which brought a series of unexampled successes. The French flag was almost swept from the seas. The French settlements in Canada were overrun and conquered. With the fall of Quebec it was determined that the system of self-government, and not that of autocracy, should control the destinies of the North American continent; and Britain emerged in 1763 the supreme colonial power of the world. The problem of power had been settled in her favour; but the problem of organisation remained unsolved. It emerged in an acute and menacing form as soon as the war was over.