“As nations are among the largest and the most complete divisions into which society is formed, the grandest aggregations of organized human power; as they raise to observation and distinction the world’s greatest men, and call into requisition the highest order of talent and ability for their guidance, preservation and success, they are ever among the most attractive, instructive and useful subjects of thought, to those just entering upon the duties and activities of life.”

Oration at Plymouth (1802)
Context: Among the sentiments of most powerful operation upon the human heart, and most highly honorable to the human character, are those of veneration for our forefathers, and of love for our posterity. They form the connecting links between the selfish and the social passions. By the fundamental principle of Christianity, the happiness of the individual is Later-woven, by innumerable and imperceptible ties, with that of his contemporaries: by the power of filial reverence and parental affection, individual existence is extended beyond the limits of individual life, and the happiness of every age is chained in mutual dependence upon that of every other.

Source: Class and society (1959), p. 4.

Afro-Asian Conference (1965)
Context: Ever since monopoly capital took over the world, it has kept the greater part of humanity in poverty, dividing all the profits among the group of the most powerful countries. The standard of living in those countries is based on the extreme poverty of our countries. To raise the living standards of the underdeveloped nations, therefore, we must fight against imperialism. And each time a country is torn away from the imperialist tree, it is not only a partial battle won against the main enemy but it also contributes to the real weakening of that enemy, and is one more step toward the final victory.

Howard Zinn on War (2000), Ch. 14: Vietnam: A Matter of Perspective http://www.thirdworldtraveler.com/Zinn/Vietnam_Perspective_HZOW.html
Context: Scholars, who pride themselves on speaking their minds, often engage in a form of self-censorship which is called "realism." To be "realistic" in dealing with a problem is to work only among the alternatives which the most powerful in society put forth. It is as if we are all confined to a, b, c, or d in the multiple choice test, when we know there is another possible answer. American society, although it has more freedom of expression than most societies in the world, thus sets limits beyond which respectable people are not supposed to think or speak. So far, too much of the debate on Vietnam has observed these limits.

Source: Here Comes Everybody: The Power of Organizing Without Organizations (2008), p. 14

Source: The Revolt of the Masses (1929), Chapter XI: The Self-Satisfied Age

Seventh Thesis
Idea for a Universal History from a Cosmopolitan Point of View (1784)
Context: What is the use of working toward a lawful civic constitution among individuals, i. e., toward the creation of a commonwealth? The same unsociability which drives man to this causes any single commonwealth to stand in unrestricted freedom in relation to others; consequently, each of them must expect from another precisely the evil which oppressed the individuals and forced them to enter into a lawful civic state. The friction among men, the inevitable antagonism, which is a mark of even the largest societies and political bodies, is used by Nature as a means to establish a condition of quiet and security. Through war, through the taxing and never-ending accumulation of armament, through the want which any state, even in peacetime, must suffer internally, Nature forces them to make at first inadequate and tentative attempts; finally, after devastations, revolutions, and even complete exhaustion, she brings them to that which reason could have told them at the beginning and with far less sad experience, to wit, to step from the lawless condition of savages into a league of nations. In a league of nations, even the smallest state could expect security and justice, not from its own power and by its own decrees, but only from this great league of nations … from a united power acting according to decisions reached under the laws of their united will.

De Docta Ignorantia (On Learned Ignorance) (1440)