One-word substitution (international relations): Select the term for a policy aimed at extending a country's empire, power, or influence over other territories. Context: Distinguish it from economic systems (capitalism/communism) and cooperative worldviews (internationalism). Instruction: Choose the most accurate single-word substitute.

Given data

• Target meaning: policy of extending a country's empire and influence.
• Options: Imperialism, Internationalism, Capitalism, Communism.

Concept / Approach
Imperialism describes expansion of control (political, economic, or military) over other regions or peoples.

Elimination reasoning
Imperialism — expansion of empire/influence; correct. ✅Internationalism — cooperation among nations; not domination. ❌Capitalism — economic system of private ownership/markets. ❌Communism — socio-economic ideology advocating common ownership. ❌

Example
19th-century European expansion into Africa is often termed imperialism.

Final Answer
Imperialism