Lesson 17: The 19th Century — Nationalism, Unification & the Abolition of Slavery

The 19th century (1801–1900) made the modern political world. Two great forces dominated: nationalism, which redrew Europe's map and then the world's, and the abolition of slavery, the largest emancipation in human history. Both forces liberated; both left unfinished work. The century also set humanity moving — tens of millions migrated across oceans, remaking populations on four continents.

Nationalism: the nation as an argument

Nationalism claims that a nation — a people bound by shared language, culture, and history — deserves its own state. After the French Revolution spread the idea that legitimacy flows from "the people," nationalists from Warsaw to Athens asked why their peoples were ruled by empires. In 1848, revolutions shook Europe in nationalism's name and mostly failed; the idea survived its defeats.

Unification showed nationalism's constructive power. Italy, long a patchwork, was stitched into a kingdom by 1861: the Piedmontese statesman Cavour supplied diplomacy and war against Austria, while Giuseppe Garibaldi's volunteer "Thousand" (1860) conquered Sicily and Naples from below; Rome was added in 1870. Germany unified by 1871 under Prussia's chancellor Otto von Bismarck, who used three calculated wars (against Denmark, 1864; Austria, 1866; France, 1870–1871) and proclaimed the German Empire in the Hall of Mirrors at Versailles. The mixtures differed — Italy blended popular volunteers with statecraft; Germany was built more coldly "from above" — but both created powerful new states and unbalanced Europe: a strong Germany at its center and a humiliated France on its border are direct causes of the tensions in Lesson 8.

The same force dissolved what it did not build. The multi-ethnic Ottoman, Austro-Hungarian, and Russian empires faced national movements among Greeks (independent by 1830), Serbs, Poles, Hungarians, Czechs, and others. Nationalism could mean liberation for one people and a death warrant for the empire holding them — and, repeatedly, a threat to minorities inside the new nation-states.

Abolition: emancipation in stages

The abolition of Atlantic slavery was the work of generations and of the enslaved themselves — through resistance from Haiti (Lesson 7) to the Demerara revolt (1823) and Jamaica's Baptist War (1831–1832), which hastened British emancipation; through abolitionist movements in which Black writers and speakers such as Olaudah Equiano (his bestselling Narrative appeared in 1789) and Frederick Douglass were central voices; through religious campaigns and mass petitions; and through political struggle. The chronology is uneven, and the unevenness is the point:

• 1807 — Britain abolishes its slave trade (the United States the same year); 1833 — Britain abolishes slavery in most of its empire (effective 1834, with a coerced "apprenticeship" until 1838).
• 1794 and 1848 — France abolishes slavery, Napoleon restores it (1802), and the Second Republic abolishes it finally in 1848.
• 1865 — the United States abolishes slavery by the 13th Amendment, after a civil war (1861–1865) that killed more than 620,000 soldiers — some estimates reach about 750,000 — and began, increasingly, as a war over slavery's expansion.
• 1888 — Brazil's Golden Law makes it the last country in the Americas to abolish slavery.

Historians still debate the weights of moral mobilization, enslaved resistance, and economic change; a serious answer includes all three and resists the tidy story of grateful freedom granted from above. And emancipation was not equality: freedpeople faced "apprenticeship," sharecropping, convict leasing, segregation, and colonial forced labor — systems that reproduced coercion under new names.

The first age of mass migration

Roughly 50 million Europeans emigrated to the Americas in the century after 1815, driven by population growth, land hunger, cheap steamship fares, and letters home. From Asia, over a million Indian workers crossed the oceans under indenture contracts to plantations in the Caribbean, Fiji, Mauritius, and Africa — a system critics called "a new system of slavery" — and Chinese migrants built railroads and mined gold from California to Australia, facing exclusion laws (the US Chinese Exclusion Act, 1882) in return. The 19th century's peoples were mixing at unprecedented scale, seeding the diasporas that shape today's world.

Working with a source: Douglass confronts a celebration

Source A — Frederick Douglass, speech "What to the Slave Is the Fourth of July?", delivered in Rochester, New York, 5 July 1852:

"What, to the American slave, is your 4th of July? I answer: a day that reveals to him, more than all other days in the year, the gross injustice and cruelty to which he is the constant victim. To him, your celebration is a sham; your boasted liberty, an unholy license..."

Content: Douglass — who had escaped slavery in 1838 — accepts his audience's values (the Declaration, the Constitution's promise, Christian conscience) and indicts the nation for betraying them. The pronoun "your" does surgical work: the holiday belongs to the free. Provenance: he spoke to a largely white abolitionist audience that had invited him, on the day after Independence Day — chosen deliberately. He is not denouncing American ideals; he is weaponizing them, as Wollstonecraft had done in Lesson 11. Corroboration: the speech's claims about slavery's violence are corroborated by slave narratives, sale records, and the statutes of the slave states themselves. Thirteen years later the 13th Amendment made his argument law — evidence that speeches, embedded in movements, move constitutions.

Global connections

Nationalism and abolition were both transnational: British emancipation pressured American debates; Haiti haunted every slave society; Italian and German unification inspired national movements from Ireland to India, while Japan's Meiji leaders (Lesson 5) studied nation-building as deliberate policy. The 19th century invented the template — a people, a state, a flag — that the 20th century's decolonizers would claim as their own (Lesson 9).

Common mistakes

• Abolition as a gift. Enslaved people's resistance is a cause, not a backdrop: revolts raised the cost of slavery and forced the question in London, Paris, and Washington.
• Calling nationalism simply good or bad. It built Italy and Germany, destabilized three empires, and within nation-states often oppressed the next minority. Specify the case.
• Assuming emancipation completed the job. List what replaced slavery locally before concluding anything about freedom.
• Forgetting indenture and Asian migration. The century's labor movements were global, not only Atlantic.

Going deeper: Equiano argues from experience — and historians argue back

Olaudah Equiano's Interesting Narrative (1789) was abolition's bestselling weapon: a first-person account of kidnapping in Africa, the Middle Passage, enslavement, self-purchase, and freedom, published by subscription with supporters' names printed in front — a political network bound in a book. It went through nine editions in his lifetime and was translated across Europe. Modern scholarship added a twist: a historian has questioned, from a baptismal record, whether Equiano was born in Africa as he narrates, suggesting he may have been born in South Carolina and written the African chapters from others' accounts. Most historians continue to treat the Narrative as substantially his testimony, and the debate itself is instructive: the book's abolitionist power never rested on one man's birthplace, since its descriptions of the slave trade are corroborated by hundreds of other sources. A source can survive legitimate doubt about details when its central claims are triangulated — Lesson 12's corroboration, doing real work in a live controversy.

Exam Experience

Source B — Otto von Bismarck, Chancellor of Prussia, addressing the Prussian parliament's budget commission, 30 September 1862:

"Germany does not look to Prussia's liberalism, but to her power... The great questions of the day will not be settled by speeches and majority decisions — that was the great mistake of 1848 and 1849 — but by blood and iron."

(a) What can be inferred from Source B about Bismarck's method? Give two inferences, each supported by a detail. [4]

Model answer. First, Bismarck openly subordinated parliaments to state power: unification would come from Prussia's army, not "speeches and majority decisions" — a direct repudiation of the liberal nationalists who had tried and failed in 1848–1849, whose failure he names as the lesson. Second, the speech is itself a political act aimed at deputies blocking his military budget: declaring that history ignores speeches, in a speech, to legislators, is a threat dressed as philosophy — fund the army, or be bypassed by it.

(b) How useful is Source B for a historian studying German unification? [8]

Model answer. As a statement of method by the man who executed it, the source is close to indispensable: the three wars of 1864, 1866, and 1870–1871 unfolded almost as the sentence promises, and its contempt for 1848 explains why the Germany of 1871 was built by a monarchy and an army rather than by a national parliament. Its limits lie in what its confidence conceals: unification also needed Cavour-style diplomacy to isolate each victim, French and Austrian errors, railway and industrial capacity, and nationalist sentiment in the German states that Bismarck harnessed while despising its liberal carriers. A speech to a budget commission is a weapon in a funding fight, and the historian should corroborate its prophecy with the wars' diplomacy before treating "blood and iron" as the whole recipe.

Marking notes

• Level 1 (1–2): paraphrases "blood and iron" as a slogan.
• Level 2 (3–5): notices audience and immediate purpose (the army budget) and the 1848 reference.
• Level 3 (6–8): tests the slogan against the diplomatic and economic record of 1864–1871 and states what the source cannot evidence alone.

Structured essay. "How far was nationalism more a force for creation than for destruction in the 19th century?" [20]

Model opening paragraph. Nationalism created the century's most durable architecture — Italy, Germany, and eventually the template every decolonizer would copy — and it did so by harnessing real grievances against dynastic and foreign rule. But its creative acts were inseparable from violence: unification was achieved through three wars and the annexation of peoples who were never consulted, and the same logic that liberated Greeks and Italians taught majorities to suspect minorities within their new states, stored the grievances (Alsace-Lorraine above all) that detonated in 1914, and in its imperial form rationalized the subjugation of Africans and Asians. On balance the century's nationalism was more creative in map-making than in human terms: it built states efficiently and taught them to define enemies efficiently too.

Marking notes

• Level 1: lists creations and destructions without weighing.
• Level 2: weighs specified cases (Italy, Germany, the multi-ethnic empires, Alsace-Lorraine) on explicit criteria.
• Level 3: separates short-term from long-term ledgers, addresses empire as nationalism's export, and defends a nuanced overall balance.