For many years past, and during the early wars of Louis XIV., Sweden was for the most part in alliance with France; her bias was that way.
The general state of Europe being as described, the spring that was to set the various wheels in motion was in the hands of Louis XIV.

The weakness of his immediate neighbors, the great resources of his kingdom, only waiting for development, the unity of direction resulting from his absolute power, his own practical talent and untiring industry, aided during the first half of his reign by a combination of ministers of singular ability, all united to make every government in Europe hang more or less upon his action, and be determined by, if not follow, his lead.

The greatness of France was his object, and he had the choice of advancing it by either of two roads,--by the land or by the sea; not that the one wholly forbade the other, but that France, overwhelmingly strong as she then was, had not power to move with equal steps on both paths.
Louis chose extension by land.

He had married the eldest daughter of Philip IV., the then reigning king of Spain; and though by the treaty of marriage she had renounced all claim to her father's inheritance, it was not difficult to find reasons for disregarding this stipulation.

Technical grounds were found for setting it aside as regarded certain portions of the Netherlands and Franche Comte, and negotiations were entered into with the court of Spain to annul it altogether.