What does this Mason Wade quote mean?

"Talon's vision was neither narrow nor dependent upon instructions from France. His mind was fascinated by the possibilities of the New World, and he dreamed great dreams, which sometimes alarmed the more cautious Colbert... The existence of English and Dutch settlements along the coast to the south was no bar to Talon's dreams of empire. He wrote home that 'nothing can prevent us from carrying the names and arms of His Majesty as far as Florida, New Sweden, New Holland and New England. 'To realize this dream, Lake Ontario was to be fortified, while the Iroquois were warned by the governor in 1671 to refrain from trading north of the lake. First Jolliet and Pere Marquette, then La Salle, traced out the Mississippi, hemming in the other European settlements on the Atlantic seaboard. But Talon had not heeded Colbert's significant warning of 1666: It would be better to restrict yourselves to an extent of territory which the colony itself will be able to maintain than to embrace so much land that eventually a part may have to be abandoned, which some consequent discredit to His Majesty's Crown. Talon was called back to France for good in 1672--he had once been briefly recalled because of his quarrels with Bishop Laval--and his successors lacked his genius. Then in the same year, Louis XIV became involved in the long series of European wars which meant the waning of royal interest and support for the colony across the ocean, whose please for more colonists were rejected by Colbert on the ground that France would be depopulated. Despite the efforts of Talon, there were only 7,000 Europeans in Quebec and 500 in Acadia by 1675; there were not then, and never were to be enough men to implement the French claim to the vast expanses of labelled New France on the maps of North America... When the final episode of the Seven Year's War opened in 1756, 1,500.000 Anglo-Americans were opposed to 70,000 French Canadians. The simple facts of population, plus the major factor of Britain's Sea power, settled the fate of New France."