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April 10, 2026
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"Warfare had become endemic in eleventh- and twelfth-century Europe. Castle building used up the resources of the land as every landholder from the king and great nobles to the small landholders fortified their dwellings. Constant skirmishing, brigandage, and open warfare at home and abroad meant that people poured vast resources into training and equipping warriors and building castles and siege machines. The motte and bailey castle with its great tower, as the keep or donjon is called in medieval documents, was admirably suited as a defense against local skirmishes."
"As castle design evolved, the great tower was eventually replaced by walled enclosures, which permitted more effective use of troops and better living conditions. The future of castle design lay with the curtain wall, that is, a wall “hung” like a curtain between towers, each of which functioned like a keep."
"By the time Henry II Plantagenet (r. 1154–89) was crowned king of England in 1154, baronial castles outnumbered royal castles. A tough, dynamic ruler, Henry began to rectify the situation at once. In the north, King Malcolm of Scotland surrendered to him, giving Henry significant castles in Scotland and in the border territory. Many older castles like Windsor were strengthened. At Dover the masonry great tower and fore building were built in the 1180s, and concentric walls with half-round towers were added by Richard the Lion Hearted seventeen years later."
"Stone towers appeared early in the Loire River valley. The massive ruin at Langeais, recently dated 992, was once a broad tower with four corner turrets. Today it stands in the park of a fifteenth-century chateau. Not far off, at Loches, the tower is the earliest surviving great tower to combine within its walls a hall, the lord’s chamber, and a chapel. Recent analysis of the wood used in the original building has dated this tower between 1012 and 1035."
"Wherever they went, William and his Norman lieutenants built castles. About 170 great vassals came to England with William. When the king rewarded his followers with grants of land, they also assumed the responsibility for its defense, so each built one or more castles. William and his men had several reasons for building castles. As hostile invaders they had to fortify their dwellings and camps in order to hold the territory and provide security for themselves. Their castles also secured borders and coastlines against other invaders and controlled the movement of people and goods at key transportation centers such as fords, bridges, and passes and along major roads."
"A motte and bailey castle consists of a man-made hill (the motte) supporting a tower and a walled yard (the bailey). (...) Early castle builders looked for a natural hill on which to erect a timber tower, but since a hill might not be available where fortifications were needed, they raised a flat-topped, conical earthen mound by digging a circular trench or ditch the desired diameter and heaping up the dirt in the center."
"Ninth-century castles were relatively small and simple affairs designed to safeguard a relatively small number of people and intended as a refuge during times of trouble."
"As they captured each territory, William and his men secured their camps with simple earth and timber defenses characteristic of northern Europe (...). These wooden structures have disintegrated, but sometimes their earthen mounds survive as rolling hills or picturesque elements in the landscape. Timber castles were especially useful to a warrior king like William the Conqueror who moved rapidly to bring new territories under control. The earth and timber castles could be built quickly, since the newly moved earth did not have to support great weight. Such structures were also relatively cheap because they required no specialized masons and expensive stone. Since the timber building tradition was widespread both in the British Isles and on the continent, the carpenters knew the building techniques. These castles were essentially towers and stockades; they provided garrison headquarters as well as residences."
"When a strong central authority protects borders and reduces internal crime, people have little need for fortified dwellings, although the rulers may build walls and towers to define legitimate residents and defend the country against external threats. When central authority breaks down, however, individuals are more likely to fortify their homes. The presence of castles in the landscape indicates a decline in stability and peace."
"Before we continue our story we must stop to ask, “What is a castle?” Once a castle was defined simply as the fortified and self-sufficient dwelling of an individual feudal lord. Today we know that castles had many functions, both practical and symbolic. The castle was a new ar chitectural form—part fortress, part residence, part statehouse, part the atrical stage. Furthermore, every castle was different, depending on the wealth of the builder, the reason for the castle (control of territory, bor der, coastlines), the local geography (availability of naturally defensible sites), the knowledge of the master builder or patron, the available ma terials, the degree of urgency (speed), and finally the building traditions of the region (the techniques the workmen knew and used). In short, there is no such thing as a typical castle; a castle was a very special build ing whose form and function answered the needs of people living in Eu rope from the eleventh through the fifteenth century."
"An alternate career path for a woman lay in the Church, where as a nun she escaped the dangers of childbirth. In the convent she could hold any position except that of priest, and as an abbess or prioress she had great power and responsibility."
"Women played a greater role than might be expected in this elite warrior society, as heiresses and chatelaines in charge of castles (see Documents 44–53). Since land was the basis of status and power, estates were kept intact by being passed on to the oldest son rather than being divided among all the children. In spite of high infant mortality and short life expectancies, a family hoped that at least one son survived to inherit lands and titles. Younger sons hoped to gain an estate of their own by marrying an heiress."
"The Church attempted to regulate this rather violent society, and eventually a code of honor evolved known as the code of chivalry. (...) Those who aspired to be knights had to have aristocratic ancestors and wealth enough to own warhorses and armor and to provide for a team of supporters."
"Never as neat or well organized as many descriptions suggest, in essence feudalism involved the exchange of grants of land for military and political service, sealed by personal oaths between the lord and the vassal. The castle has been called the perfect architectural expression of the European feudal age."
"Were castles really as rough and rugged as their owners? The answer seems to be, “not necessarily.” Castles were indeed rough and rugged fortresses, the product of an essentially elite, masculine warrior society, what today we call a feudal society. But they were also among the finest buildings of their times—secure, well-built residences that supported the complex rituals of noble life. To understand how castle form came to meet castle function, we must look briefly at the castle’s social and economic underpinnings."
"The castle was far more than a walled and turreted fortress; it was an instrument of social control and the symbol of power, authority, and wealth."
"At the end of the Middle Ages, castles began to lose their military function, but not their psychological impact as a symbol of authority. Gun powder and cannons supported armies of mercenary troops, and the garrison forts built to house them adopted the crenellated walls of private aristocratic castles. By the sixteenth century, professional soldiers lived in barracks, a few officers and the governor had finer quarters, and kings and nobles merely directed the operations from distant palaces where battlements had become purely symbolic decoration. The Battle of Crecy between France and England in 1346 is traditionally considered to be the first use of cannons on the battlefield. At first the noise and smoke created by the explosion terrified horses and men, and wreaked more havoc than the projectiles. Early cannons could be more dangerous for the gunners than for the enemy, but military engineers rapidly developed the weapons’ power and accuracy. A castle’s high walls and towers made easy targets for gunners whose power and accuracy reduced once formidable medieval buildings to rubble. Mining became more successful because the attackers could put explosives under the walls."
"Just as towers and crenellations indicated a building’s status, so the crenellated wall signified a castle in the visual arts and in that distinctive medieval sign language known as heraldry. The heraldic symbol of the kingdom of Castile, for example, consisted of a wall and three crenellated towers. This simple composition was easily recognized and reproduced."
"Whether looming over the land as a symbol of a ruler’s authority or providing a setting for displays of wealth and power in spectacular feasts and tournaments, castles made a visual statement about their owners. All ar chitecture has symbolic overtones, and the castle is a potent image."
"A sharp contrast existed between the upper classes who constantly moved from manor to manor and the peasants who were tied to the land and lived in agricultural villages outside the castle walls. Yet economic opportunities expanded for both groups."
"The last bastions of resistance to evolutionary theory are organized religion and cultural anthropology."
"According to the first image of international relations, the locus of the important causes of war is found in the nature and behavior of man. Wars result from selfishness, from misdirected aggressive impulses, from stupidity."
"“Some have even said that Iran with nuclear weapons would stabilize the Middle East, I think people who say this have set a new standard for human stupidity.”"
"We differed on the last point, and sometimes on the key, recurring question of American foreign policy: When is military intervention justified, by which he meant, when is it in the national interest? Waltz had no patience for "liberal intervention," or what we might now call humanitarian intervention, because we could never be sure that we would succeed in making things better over the long-term. And he had little patience for supposed national security arguments that could not identify a threat to vital interests — we are not, and therefore should not act like, an empire. Waltz was not an isolationist, but he was definitely a minimalist when it came to the use of force."
"Waltz is to the study of international relations what Darwin is to the study of biology. I make this claim in terms of the sheer intellectual significance of his theoretical contribution. One cannot make sense of the biological world apart from Darwin’s theory of evolution: equally, Waltz’s structural framework for understanding how states interact under anarchy, with an uneven distribution of power and a desire to survive, offers a powerful theory for making sense of the international system. Neither theory explains everything in their domain — one always needs to know more about particularities — but both provide compelling big-picture explanations of their domains."
"Like any truly great thinker, Ken Waltz defied stereotypes. The preeminent hard-headed theorist of power politics, he savaged the hopes of those who believe that moral energy, liberal principles, or democratic crusades can end war. But he belied the common assumption that realists are callous hawks who relish the use of force. He opposed the Vietnam War, the Reagan military buildup, and the 2003 invasion of Iraq as overreactions to threats that were exaggerated and could be handled by calm containment and deterrence."
"Differences in the incidence of destruction and "death" do not account for the reluctance to refer to international politics as a harmonious realm, while competitive economies are often so described. Instead, one may say that the standards of performance now applied to international political systems are higher, or at least widely different. As John Maynard Keynes once remarked, those who believe that unhampered processes of natural selection lead to progress do not "count the cost of the struggle" (1926, p. 37). In international politics, we often count nothing but the costs of the struggle."
"I am not saying that such a theory cannot be constructed, but only that I cannot see how to do it in any way that might be useful. The decisive point, anyway, is that a macrotheory of international politics would lack the practical implications of macroeconomic theory. National governments can manipulate system-wide economic variables. No agencies with comparable capabilities exist internationally. Who would act on the possibilities of adjustment that a macrotheory of international politics might reveal?"
"If we gather more and more data and establish more and more associations, however, we will not finally find that we know something. We will simply end up having more and more data and larger sets of correlations."
"Each state pursues its own interest's, however defined, in ways it judges best. Force is a means of achieving the external ends of states because there exists no consistent, reliable process of reconciling the conflicts of interest that inevitably arise among similar units in a condition of anarchy."
"It is not true that were the Soviet Union to disappear the remaining states could easily live in peace."
"War may achieve a redistribution of resources, but labor, not war, creates wealth."
"No system of balance functions automatically."
"The implication of game theory, which is also the implication of the third image, is, however, that the freedom of choice of any one state is limited by the actions of the others."
"In a zero-sum game, the problem is entirely one of distribution, not at all one of production."
"Then what explains war among states? Rousseau's answer is really that war occurs because there is nothing to prevent it."
"The best critical consideration of the inherent weakness of a federation of states in which the law of the federation has to be enforced on the states who are its members is contained in the Federalist Papers."
"States in the world are like individuals in the state of nature. They are neither perfectly good nor are they controlled by law."
"In anarchy there is no automatic harmony."
"With many sovereign states, with no system of law enforceable among them, with each state judging its grievances and ambitions according to the dictates of its own reason or desire - conflict, sometimes leading to war, is bound to occur."
"Once socialism replaces capitalism, reason will determine the policies of states."
"External pressure seems to produce internal unity."
"Is it capitalism or states that must be destroyed in order to get peace, or must both be abolished?"
"To build a theory of international relations on accidents of geography and history is dangerous."
"The transitory interests of royal houses may be advanced in war; the real interests of all people are furthered by the peace."
"War most often promotes the internal unity of each state involved. The state plagued by internal strife may then, instead of waiting for the accidental attack, seek the war that will bring internal peace."
"If we are to have peace, we must learn loyalty to a larger group. And before we can learn loyalty, the thing to which we are to be loyal must be created."
"The most important causes of political arrangements and acts are found in the nature and behavior of man."
"To solve these problems one needs as much an understanding of politics as an understanding of man - and the one cannot be derived from the other."
"Each man does seek his own interest, but, unfortunately, not according to the dictates of reason."