Unit 9.9 — Continuity and Change in a Globalized World
Topic 9.9 closes the entire AP World History course with the CCOT skill: technology genuinely transformed communication, medicine, agriculture, and economics from 1900 to the present, while religious identity, social hierarchy, class inequality, and uneven regional wealth persisted — echoing continuities traced since Unit 1.
Topics 9.1–9.8 covered every piece of globalization's story: technology, disease, environment, economics, reform, culture, resistance, and the institutions built to manage it all. Topic 9.9 closes not just Unit 9 but the entire AP World History course the same way Topics 4.8, 5.10, 6.8, 7.9, and 8.9 each closed their own units — with the CCOT skill, now applied to the full sweep from 1900 to the present, and asking you to weigh how much science and technology actually changed the world versus what stayed remarkably constant.
The CCOT thesis formula, one final time
The same structure that closed Units 4 and 5 applies here at full course scale: "While [a named continuity] persisted, [a named change] transformed [a named region or system]." Because this topic spans the entire unit — and implicitly draws on the whole course — the strongest theses pull specific, named evidence from across multiple topics rather than staying confined to Unit 9 alone.
What genuinely changed, 1900–present
Science and technology transformed nearly every dimension of daily life: communication and transportation collapsed distance further than ever (Topic 9.1's internet, air travel, and shipping containers, building directly on Topic 5.5's telegraph and steamships); medicine extended life expectancy dramatically through vaccines and antibiotics (Topic 9.2); agriculture was industrialized through the Green Revolution's combined innovations (Topic 9.1); economies shifted toward free-market reform and liberalization after decades of Cold War command-economy competition (Topic 9.4, following Topic 7.4's and 8.4's earlier state-controlled models); manufacturing relocated globally through multinational supply chains (Topic 9.4's maquiladoras and export-oriented industrialization); and consumer culture became genuinely global (Topic 9.6's Hollywood, Bollywood, and worldwide brands).
What stayed remarkably constant despite all of this
The exam specifically rewards resisting the temptation to treat 1900–present as total transformation. Several continuities persisted throughout, echoing similar continuity points from Topics 4.8 and 5.10 earlier in the course: religious traditions remained a powerful source of identity and political mobilization (Topic 9.7's religious fundamentalism as resistance to secularization proves religion never receded as a historical force); social hierarchies and class inequality persisted even as absolute wealth grew (Topic 9.4's uneven globalization benefits, Topic 9.3's unequal environmental burden); uneven access to technology meant the genuine advances of Topics 9.1–9.2 never reached all populations equally; and stark regional differences in wealth and opportunity persisted, tracing continuously back through Topic 8.6's inherited colonial-era economic dependency all the way to Topic 6.4's export economies.
A course-spanning model thesis
"While science and technology transformed communication, medicine, agriculture, and consumer culture into a genuinely interconnected global system between 1900 and the present — collapsing distances the telegraph and steamship (Unit 5) had only begun to shrink — this transformation did not eliminate the older patterns of unequal wealth, religious identity, and social hierarchy that had structured every earlier unit of this course, from the tribute systems of Unit 1 through colonial export economies (Unit 6) to Cold War-era inequality (Unit 8); globalization redistributed and intensified these patterns more often than it erased them." This thesis deliberately reaches back across nearly the entire course — exactly the kind of long-range synthesis this final topic is built to reward.
Why this matters for the exam
Topic 9.9 is the last CCOT skill-check of the course, and it rewards the same discipline as every earlier one: name a specific continuity and a specific change, explain the relationship between them rather than listing each in isolation, and support both sides with precise evidence. Because this is the course's final topic, the strongest possible answer draws evidence from multiple units — proof that you can trace a single analytical thread (what changes, what persists, and why) across the full 1200-to-present sweep this entire course has covered.
Sources: OER Project — Continuity and Change in a Globalized World, Fiveable — Continuity and Change in a Globalized World.