Unit 9 takes Europe from 1945 to the present. The same four key concepts as Unit 8 apply, but the emphasis shifts: a polarised state order, competing conceptions of the individual and the state, continued questioning of objective knowledge, and demographic and economic change reshaping everyday life.

The unit has two halves that must be held together - division until 1991, and integration running alongside and then beyond it.

Marshall Plan 马歇尔计划 funds from the United States financed an extensive reconstruction of industry and infrastructure and stimulated an economic revival in Western Europe.

The Marshall Plan is examinable in two directions at once: it rebuilt Western Europe, and by being refused for the Soviet bloc it helped harden the division that defines the rest of the unit.

Despite efforts to maintain international cooperation through the newly created United Nations 联合国, deep-seated tensions between the two blocs produced the Cold War.

The CED lists how it was actually conducted, and the list is worth memorising because questions ask for methods:

• propaganda campaigns 宣传战;
• covert actions 秘密行动;
• limited "hot wars" 有限热战 in other regions;
• an arms race 军备竞赛.

Note what is absent: direct war between the principals. The methods list is the answer to "how could a conflict this intense produce no direct war".

• The United States exerted strong military, political, and economic influence in Western Europe, leading to the creation of NATO 北约.
• Countries east of the Iron Curtain 铁幕 came under the military, political, and economic domination of the Soviet Union.
• Central and Eastern European nations within the Soviet bloc followed an economic model based on central planning 中央计划 and extensive social welfare provision.
• Those nations' relationship with the Soviet Union oscillated between repression and reform 镇压与改革之间摆动 - which is the CED's own phrase and a better answer than either alone.
• The rise of new nationalisms in Central and Eastern Europe eventually brought peaceful revolution in most countries, but violent conflict in some.

Nationalist and separatist movements, along with ethnic conflict and ethnic cleansing 族群清洗, periodically disrupted the post-war order. The examinable point is that 1945 did not end the problem of nationalism in Europe; it suppressed it in some places and postponed it in others.

Postwar economic growth supported an increase in welfare benefits 福利待遇; subsequent economic stagnation 经济停滞 led to criticism and scaling back of the welfare state 福利国家.

Hold both halves. Growth funded the welfare state; the end of growth is what put it under argument - which is a causal claim, not just a sequence of events.

Following a long period of economic stagnation, Mikhail Gorbachev's 戈尔巴乔夫 internal reforms of perestroika 改革 and glasnost 开放 - despite being intended to strengthen the system - contributed to its collapse.

The collapse of the USSR in 1991 苏联解体 ended the Cold War and led to the establishment of capitalist economies throughout Eastern Europe.

The shape of the argument matters: reform intended to save a system helped end it. That is the kind of claim an evaluation question rewards.

The lives of women were defined by family and work responsibilities, economic changes, and feminism 女性主义. Across the century: expanding participation in paid work, especially during both wars; the extension of political rights; and organised movements that changed law and expectation in the postwar decades.

The process of decolonisation 去殖民化 occurred over the course of the century with varying degrees of cooperation, interference, or resistance from the European imperial powers.

The consequence for Europe itself is the part students omit: losing empire changed what a European state was, and it produced the migration examined two topics below.

European states began to set aside nationalist rivalries in favour of economic and political integration 经济与政治一体化, forming a series of institutions that became the European Union 欧盟.

And the tension the CED names explicitly: EU member nations continue to balance questions of national sovereignty against the responsibilities of membership in an international body. That balance is the examinable issue, not the institutional history.

• Because of the economic growth of the 1950s and 1960s, migrant workers 外来劳工 from southern Europe, Asia, and Africa immigrated to northern and western Europe.
• Increased immigration altered Europe's religious makeup 宗教构成, causing debate and conflict over the role of religion in public life 宗教在公共生活中的角色.

Note the CED's own causal order: economic growth created labour demand, and migration followed it. The debates came afterwards.

• Medical theories and technologies extended life but posed social and moral questions that eluded consensus 未能形成共识.
• Increased imports of US technology and popular culture after the war generated both enthusiasm and criticism 既受欢迎也遭批评.
• New communication and transportation technologies multiplied connections across space and time, transforming daily life.
• Green parties 绿党 in Western and Central Europe challenged consumerism and urged sustainable development 可持续发展.

• The effects of world war and economic depression undermined confidence in science and human reason, giving impetus to new intellectual currents.
• Organised religion continued to play a role in European social and cultural life despite these challenges - a continuity worth stating, because answers tend to assume simple secularisation.
• The arts were defined by experimentation, self-expression, subjectivity, and increasing global influence.
• Mass production, new food technologies, and industrial efficiency increased disposable income and created a consumer culture 消费文化.
• With postwar recovery the birth rate rose dramatically - the baby boom 婴儿潮 - often promoted by government policy.
• Various movements - women's movements, political and social movements, gay and lesbian movements - pressed for rights and recognition.
• Intellectuals and youth reacted against perceived bourgeois materialism, most significantly in the movements of the later 1960s.

The unit's reasoning skill is continuity and change.

Worked example (a real AP exam question). AP European History short-answer questions here ask, for example, to "Explain one way in which European integration after 1945 represented a change from earlier European international relations." A full-mark answer states the change against what it replaced: "Before 1945 European states pursued national interest through competing alliances and, repeatedly, war. After 1945 states began to set aside those rivalries in favour of shared institutions, accepting binding common rules on trade and law - so a dispute between members became a matter for negotiation within an institution rather than a matter for the balance of power." Notice that a change claim needs the prior state of affairs to be named.

• The unit has two simultaneous stories - division until 1991 and integration throughout. Weak answers tell only one.
• Memorise the Cold War's methods: propaganda, covert action, limited hot wars, arms race. The absence of direct war is the point.
• "Oscillated between repression and reform" is the CED's phrase for the Soviet bloc. It beats either half alone.
• Gorbachev's reforms were intended to strengthen the system. That irony is what an evaluation question is looking for.
• The welfare state grew on growth and was questioned when growth stopped. State the causal link.
• Migration followed labour demand created by the postwar boom. Get the causal order right before discussing the debates.