For at the opening of the seventeenth century the old order was fast disappearing. The ideal of a single Christian community, so long symbolized by the Holy Roman Empire and the Holy Catholic Church, was losing its hold upon the minds of men as the result of the differentiation of European culture on lines of racial or national distinction. In politics this movement was embodied in the rise of the centralized national state; and the sixteenth century ushered in the era of international wars, of which the struggle between Elizabeth and Philip II was one, and one of the most important. When such conflicts were always impending, it was essential that the resources of the nation should be at the disposal of the Government. The national state could, therefore, neither share authority with the Pope at Rome, nor endure independent feudal or municipal jurisdictions within the realm; and in its military and administrative organization, feudal officers, since the thirteenth century in France and England, had been steadily replaced by paid agents appointed by the king, whose hostility to the Pope was chiefly inspired by the desire to secure from the Church the money necessary to maintain them. A well-filled treasury was thus the first need of the sixteenth-century state, and so it fell out that in western Europe the middle class--the merchant and the capitalist and the money-lender--was the chief resource of kings in conflict with feudal or ecclesiastical privilege. The prosperity of the trading class and the efficiency of the Government were thought to be inseparable; and that commerce should be regulated in the interest of the state was, therefore, the unquestioned maxim of the age.