AP Syllabus focus:
'The breakdown of the Concert of Europe encouraged national unification in Italy and Germany and liberal reforms elsewhere.'
After 1815, Europe’s rulers tried to preserve peace through cooperation, but growing rivalry and nationalism shattered that framework, opening political space for unification movements and selective liberal reform across the continent.
The Concert of Europe
After Napoleon’s defeat, the major powers attempted to avoid another continent-wide war by consulting one another and defending the Vienna settlement. This arrangement, known as the Concert of Europe, aimed to preserve order and prevent major territorial disruption.
Concert of Europe: An informal system of great-power cooperation after 1815 meant to preserve the post-Napoleonic settlement, maintain the balance of power, and resist revolutionary upheaval.
The Concert was not a permanent international organization. Instead, it depended on shared interests among Austria, Russia, Prussia, Britain, and later France. As long as these states feared revolution more than they distrusted one another, the Concert could restrain conflict and uphold conservative stability.
Why the Concert Broke Down
From shared conservatism to competing interests
The Concert weakened because the great powers gradually stopped agreeing on what “order” meant. Nationalism challenged multinational empires, while liberalism pressed for constitutions, representative government, and civil rights. The revolutions of 1848 showed that these pressures were widespread and could not be permanently suppressed.
At the same time, the powers pursued conflicting goals. Austria wanted to block nationalist change, especially in central and southern Europe. Britain was less committed to armed intervention against reform movements. France, especially under Napoleon III, increasingly followed a policy based on national advantage rather than collective conservatism. Once national interest outweighed ideological unity, the Concert lost its foundation.
War and the collapse of diplomatic consensus
The most dramatic blow came with the Crimean War.
This map situates the Crimean War within the wider Black Sea region, highlighting the opposing sides and the strategic geography behind the “Eastern Question.” Seeing the theater on a map clarifies why the conflict mattered diplomatically: it forced the great powers into open alignment and warfare rather than coordinated crisis management. Source
Instead of acting together, the powers split sharply over the Eastern Question and the future of the Ottoman Empire. Russia emerged isolated, Austria lost Russian goodwill, and France and Britain showed that major powers were willing to fight rather than manage disputes through congress diplomacy.
After this rupture, European diplomacy became less collective and more competitive. States relied more on temporary alliances, limited wars, and strategic calculation. That shift mattered because the old system had been designed to prevent exactly the kind of territorial and political change that nationalist movements demanded.
How the Breakdown Encouraged Italian Unification
Before the Concert weakened, Austria could expect broad conservative support for keeping the Italian peninsula divided and under strong Habsburg influence. Nationalist uprisings therefore faced not just local rulers but the wider post-1815 order.
Once the Concert fractured, that protection eroded.
This historical atlas map visualizes the territorial stages of Italian unification from the post-1815 settlement through the later annexations associated with creating a unified Italian state. By emphasizing which regions joined when, it helps connect diplomatic opportunity (weakened great-power coordination) to concrete border change on the peninsula. Source
Piedmont-Sardinia could pursue unification with the help of selective diplomacy rather than confronting a united coalition of great powers. France was willing to support war against Austria in 1859, and the other powers did not act together to restore the old settlement. Italian nationalism had existed earlier, but it became much more effective when the diplomatic system that defended fragmentation no longer worked.
The key causal point is that the breakdown of the Concert did not create nationalism in Italy; it removed barriers that had long blocked nationalist success.
How the Breakdown Encouraged German Unification
The same pattern appeared in the German lands. The Congress of Vienna had created a framework meant to preserve balance and contain upheaval in central Europe. A strong Concert might have checked any state that tried to redraw borders by force.
By the 1860s, however, Austria and Prussia were competing for leadership in Germany, and the great powers were too divided to intervene collectively.
That division gave Prussia greater freedom of action. Instead of facing a united Europe, Prussia could exploit rivalries among the powers and reshape the political map through war and diplomacy. This helps explain why diplomatic breakdown mattered as much as nationalist sentiment.
German unification therefore depended not only on nationalism but also on the failure of the Concert’s older habits of restraint. Once collective enforcement of the Vienna settlement weakened, unification through power politics became possible.
Liberal Reforms Elsewhere
Reform as a response to weakness and pressure
The Concert had supported conservative governments by implying that revolution or radical reform might trigger outside intervention. As that system faded, rulers increasingly understood that they could not rely on a single, coordinated conservative front. That changed the political environment for reformers.
Governments also recognized that military weakness and diplomatic isolation could be dangerous in a competitive Europe. Some states therefore pursued liberal reforms not from ideological commitment alone, but to strengthen the state, calm unrest, and modernize institutions. Reform became a practical strategy of survival in a more fluid international system.
In Russia, defeat in the Crimean War helped convince the government that major reform was necessary, contributing to measures such as the emancipation of the serfs in 1861. In the Habsburg lands, pressure from nationalism and military setbacks pushed rulers toward constitutional concessions and political restructuring. Across Europe, the weakening of reactionary coordination made it harder to restore the old order exactly as it had existed after 1815.
Cause-and-Effect Chain
Breakdown of cooperation weakened the conservative international order created at Vienna.
Reduced collective intervention meant the great powers could no longer consistently suppress political change together.
Nationalist states in Italy and Germany gained more room to challenge old borders and political arrangements.
Other governments adopted reforms more readily when military defeat, unrest, and diplomatic isolation exposed the limits of repression.
FAQ
Informal empire was cheaper and often less risky. A government could gain trade privileges, loans, or political influence without paying the full cost of administration and occupation.
Direct rule usually came later when informal control seemed insecure, when rivals threatened intervention, or when local resistance endangered foreign investments. In that sense, annexation was sometimes the result of rivalry rather than the original goal.
Empires were valued not only for territory but also for manpower and supplies. Colonial troops, labour, foodstuffs, and raw materials could strengthen a state's military potential.
This made imperial holdings part of wider strategic planning. Rivals worried that an overseas empire could support naval power, sustain war industries, and increase endurance in a long conflict, which made colonial competition seem even more serious.
Maps were political tools. Surveying land, fixing borders, and naming regions helped convert vague influence into claims that could be defended diplomatically.
Because European officials often drew borders with limited local knowledge, maps could simplify or distort realities on the ground. That created disputes not only between empires but also within colonised regions, where unclear boundaries could later become flashpoints for conflict.
Great Powers did not treat every colony as equally important. If leaders believed a dispute threatened wider war over a limited objective, compromise could seem the safer option.
Domestic weakness, military unreadiness, or pressure from financial markets could also encourage restraint. In some cases, governments preferred to trade influence in one region for gains somewhere else, especially when diplomacy could preserve prestige without actual fighting.
Business interests often lobbied for protection, railway concessions, mining rights, or guaranteed markets. Their pressure did not automatically create empire, but it could push governments to defend private claims as national interests.
Once a state backed investors or trading companies, commercial disputes could become diplomatic crises. This mattered because rivals then interpreted economic penetration as a step towards political control, even before formal annexation took place.
Practice Questions
Identify one new method of imperial control in the late nineteenth century and briefly explain how it increased tension among the Great Powers. (2 marks)
1 mark for identifying a valid method, such as formal annexation, protectorates, telegraph communication, railroads, machine guns, or stronger colonial administration.
1 mark for explaining how that method increased rivalry, such as by speeding conquest, making exclusion more permanent, or turning local disputes into international crises.
Explain how imperial expansion affected European and global stability in the period 1870-1914. Use at least two specific historical examples. (6 marks)
1 mark for a clear argument that imperial expansion increased tensions and weakened stability.
1 mark for explaining at least one motive for imperial expansion, such as prestige, strategic security, economic interest, or racial ideology.
1 mark for explaining at least one method of control, such as direct conquest, protectorates, or industrial technology.
1 mark for linking those motives or methods to worsening Great Power relations.
1 mark for one specific example accurately used, such as Fashoda, the Berlin Conference, or the Moroccan Crises.
1 mark for explaining a broader effect on stability in Europe or beyond Europe, such as alliance strain, mistrust, or repeated international crises.
