7. Hitherto in the history of the world mountains had been found necessary for the preservation of human liberty. Thermopylæ, Morgarten, Bannockburn, were all fought where precipitous hill-sides and narrow valleys prevented the champions of freedom from being overwhelmed by numbers, and where a single man in defense of his home could wield more power than ten men in attack. The tyrants who lorded it over plains had learned by dear experience to shun mountains and avoid collisions with mountaineers; and, in case of controversies, they always endeavored to gain by stratagem what they could not obtain by force. Austrian tyranny had dashed itself in vain against the Alps, and English tyranny had turned back southward, thwarted and impotent, from the Scotch Highlands. 8. But it was to be demonstrated that liberty might have a home in other than mountain fastnesses. Along the North Sea is a stretch of country redeemed from the ocean. Great dikes, faced with granite from Norway, withstand the tempest from the turbulent ocean, and smaller dikes prevent inundations from rivers. In thousands of square miles the only land above sea-level is the summit of the dikes. In the polders or hollow places below the sea, and saved from destruction only by the dikes, is some of the richest and most productive land in Europe. Here prospered a teeming and industrious population. Agriculture, the parent of national prosperity, flourished as nowhere else. Manufactures and trade had followed in its train, until the hollow lands had become the beehive of Europe. The direction of the most vast commercial enterprises had been transferred from the lagoons of Venice to the cities of the dikes. 9. This country for centuries had constituted a part of the German Empire. At one side of the great lines of communication, and moored so far out to sea, it had been overlooked and neglected to a certain degree by the reigning dynasties; and out of this neglect grew its prosperity. While the rule of the central government was nearly nominal, the feudal lords never obtained a strong foothold in the country, and the order and peace of the communities were preserved by municipal officers chosen by suffrage. In process of time wealthy burgher families fairly divided political influence with princes, acid dictated a policy at once wise and humane. Extortioners were suppressed, industries fostered, and peace maintained. 10. In the religious controversies which followed the preaching of Luther, the eastern provinces of the hollow land almost exclusively espoused the new religion, while the western provinces clung as tenaciously to the old. While this difference in religious opinions gave rise to disputes, and tended toward the disruption of social relations, for many years toleration was practiced and peace preserved.