linguistic:voice_change, structural:summarization
Politics

Thoreau was fervently against slavery and actively supported the abolitionist movement. He participated as a conductor in the Underground Railroad, delivered lectures that attacked the Fugitive Slave Law, and in opposition to the popular opinion of the time, supported radical abolitionist militia leader John Brown and his party. Two weeks after the ill-fated raid on Harpers Ferry and in the weeks leading up to Brown's execution, Thoreau delivered a speech to the citizens of Concord, Massachusetts, in which he compared the American government to Pontius Pilate and likened Brown's execution to the crucifixion of Jesus Christ:

Some eighteen hundred years ago Christ was crucified; this morning, perchance, Captain Brown was hung. These are the two ends of a chain which is not without its links. He is not Old Brown any longer; he is an angel of light.

In " The Last Days of John Brown ", Thoreau described the words and deeds of John Brown as noble and an example of heroism. In addition, he lamented the newspaper editors who dismissed Brown and his scheme as "crazy".

Thoreau was a proponent of limited government and individualism. Although he was hopeful that mankind could potentially have, through self-betterment, the kind of government which "governs not at all", he distanced himself from contemporary "no-government men" (anarchists), writing: "I ask for, not at once no government, but at once a better government."

Thoreau deemed the evolution from absolute monarchy to limited monarchy to democracy as "a progress toward true respect for the individual" and theorized about further improvements "towards recognizing and organizing the rights of man". Echoing this belief, he went on to write: "There will never be a really free and enlightened State until the State comes to recognize the individual as a higher and independent power, from which all its power and authority are derived, and treats him accordingly."

It is on this basis that Thoreau could so strongly inveigh against the British administration and Catholicism in A Yankee in Canada. Despotic authority, Thoreau argued, had crushed the people's sense of ingenuity and enterprise; the Canadian habitants had been reduced, in his view, to a perpetual childlike state. Ignoring the recent rebellions, he argued that there would be no revolution in the St. Lawrence River valley.

Although Thoreau believed resistance to unjustly exercised authority could be both violent (exemplified in his support for John Brown) and nonviolent (his own example of tax resistance as described in "Resistance to Civil Government"), he regarded pacifist nonresistance as temptation to passivity, writing: "Let not our Peace be proclaimed by the rust on our swords, or our inability to draw them from their scabbards; but let her at least have so much work on her hands as to keep those swords bright and sharp." Furthermore, in a formal lyceum debate in 1841, he debated the subject "Is it ever proper to offer forcible resistance?", arguing the affirmative.

Likewise, his condemnation of the Mexican–American War did not stem from pacifism, but rather because he considered Mexico "unjustly overrun and conquered by a foreign army" as a means to expand the slave territory.

Thoreau was ambivalent towards industrialization and capitalism. On one hand he regarded commerce as "unexpectedly confident and serene, adventurous, and unwearied" and expressed admiration for its associated cosmopolitanism, writing:

I am refreshed and expanded when the freight train rattles past me, and I smell the stores which go dispensing their odors all the way from Long Wharf to Lake Champlain, reminding me of foreign parts, of coral reefs, and Indian oceans, and tropical climes, and the extent of the globe. I feel more like a citizen of the world at the sight of the palm-leaf which will cover so many flaxen New England heads the next summer

On the other hand, he wrote disparagingly of the factory system:

I cannot believe that our factory system is the best mode by which men may get clothing. The condition of the operatives is becoming every day more like that of the English; and it cannot be wondered at, since, as far as I have heard or observed, the principal object is, not that mankind may be well and honestly clad, but, unquestionably, that the corporations may be enriched.

Thoreau also favored the protection of animals and wild areas, free trade, and taxation for schools and highways, and espoused views that at least in part align with what is today known as bioregionalism. He disapproved of the subjugation of Native Americans, slavery, philistinism, technological utopianism, and what can be regarded in today's terms as consumerism, mass entertainment, and frivolous applications of technology.