physics

Population cleansing

Population cleansing is a physics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Population cleansing rather than just read about it. In short: Population cleansing is the deliberate removal of a population with certain undesirable characteristics, such as its ethnicity (ethnic cleansing), its religion (religious cleansing), its social group (social cleansing), its social class, its ideological or political criteria (political cleansing), etc. from certain territories. Throughout antiquity, population cleansing was largely motivated by economic and politica…

Key takeaways

Population cleansing belongs to physics; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Population cleansing to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Population cleansing from memory before moving on to harder problems.

Reference excerpt

Population cleansing is the deliberate removal of a population with certain undesirable characteristics, such as its ethnicity (ethnic cleansing), its religion (religious cleansing), its social group (social cleansing), its social class, its ideological or political criteria (political cleansing), etc. from certain territories. Throughout antiquity, population cleansing was largely motivated by economic and political factors, although ethnic factors occasionally played a role. Andrew Bell-Fialkoff attributes the earliest known example of cleansing as a state policy to Assyria. Assurnasirpal II and Assurbanipal resettled millions of people from the conquered territories in order to crush the resistance. Usually upper classes were resettled, rather than complete populations, because peasant and artisan masses usually lacked leadership to initiate revolts. He further gives a number of other cases in Chapter 1 "Cleansing: A Historical Overview" of his book. While discussing the case of Ancient Greece, Bell-Fialkoff singles out a special type of the elimination of a conquered polis, for which the Greeks had a special term: andrapodismos (from the word ἀνδράποδον, one taken in war and sold as a slave). Andrapodismos involved the destruction of a polis, killing all male adults and selling women and children into slavery. Other kinds of the elimination of a polis (with or without its destruction) involved removal of its whole population to another polis, dispersing over villages, or emigration of its population, possibly founding a polis elsewhere. Since ancient times, methods of cleansing varied from killing (democide, genocide) to forced population transfer, to forced emigration.

Illustrations

Worked examples

Example 1 — a first encounter with Population cleansing

Start with the simplest possible case. Write down what Population cleansing claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Population cleansing before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Population cleansing ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Population cleansing

In research: Population cleansing appears in physics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Population cleansing in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Population cleansing is common in secondary-school and first-year university syllabi. It links to neighbouring topics Forced migration, Human rights abuses, Human rights stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Population cleansing outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Population cleansing” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Population cleansing in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Population cleansing means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Population cleansing out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Population cleansing in simple terms?

Why does Population cleansing matter?

Because it connects several physics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Population cleansing?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Population cleansing.