IB Economics HLTopic 4 — The Global EconomyPaper 1, 2 & 3Core idea~11 min read
The Sustainable Development Goals
Growth that wrecks the thing it depends on is not really growth. Sustainable development is the attempt to raise living standards now without handing the bill to the next generation — and the 17 SDGs are the world’s shared attempt to write that idea down as measurable targets.
📚 What you need to know
Sustainable development meets the needs of the present without stopping future generations meeting their own.
In 2015 UN member states agreed The 2030 Agenda for Sustainable Development.
At its centre are the 17 Sustainable Development Goals (SDGs).
The goals cover three overlapping strands: economic, social and environmental.
Sustainability sits where all three overlap — two out of three is not enough.
The SDGs work as both a target to aim for and a measuring stick for progress.
Why three strands, not one
Development used to be treated as an income question: raise GDP per head and everything else follows. The SDG framework rejects that. It says progress has to happen on three fronts at once, and that pairs of strands without the third are never durable.
Learn the three overlap words. Examiners like them because each one names a specific failure.
Overlap
What is present
What is missing, and why it fails
Viable
Economic and environmental
No social strand. Green growth that leaves most people out breeds resentment and eventually political instability
Bearable
Social and environmental
No economic strand. Fair and clean, but with no income growth there is nothing to fund schools, clinics or clean technology
Equitable
Economic and social
No environmental strand. Living standards rise for a while, then the soil, water or climate that made it possible gives out
Sustainable
All three
Nothing. This is the only combination that holds up over generations
Notice that each failure mode is really an opportunity cost in disguise. A country choosing two strands is not being lazy; it is choosing which cost to postpone. Saying that in an essay is worth more than reciting the definitions.
How the 17 goals are organised
Seventeen goals is a lot to hold in your head. The UN itself groups them into five headings, which is far easier to remember and much more useful in an exam.
If you can name the five headings and give one goal under each, you can answer almost any SDG question without memorising all seventeen.
The seventeen goals in one line each
Goal
In one line
1. No poverty
End poverty everywhere, in both its absolute and relative forms
2. Zero hunger
End hunger, secure food supplies and make farming sustainable
3. Good health
Healthy lives and wellbeing for people of every age
4. Quality education
Inclusive, fair education and lifelong learning for all
5. Gender equality
Equality for women and girls, and real power to act on it
6. Clean water
Safe water and sanitation, managed so it does not run dry
7. Affordable energy
Energy that is cheap, reliable, modern and clean
8. Decent work
Sustained growth with full employment and decent conditions
9. Industry and infrastructure
Resilient infrastructure and innovation that includes everyone
10. Reduced inequalities
Narrow the gaps within countries and between them
11. Sustainable cities
Cities that are safe, inclusive and able to cope with shocks
12. Responsible consumption
Produce and consume without exhausting what we depend on
13. Climate action
Act urgently on climate change and its consequences
14. Life below water
Use oceans, seas and marine resources without destroying them
15. Life on land
Protect ecosystems, forests and soil, and stop biodiversity loss
16. Peace and institutions
Peaceful societies, access to justice, institutions that work
17. Partnerships
The global cooperation and finance needed to deliver the rest
You do not need all seventeen memorised. You need the definition, the three strands, the five headings, and the ability to pick two or three goals that fit whatever case study the paper gives you.
Why economists care about a UN list
🧩 The three jobs the SDGs do
They define the target. Development stops being a vague word and becomes seventeen stated aims with deadlines.
They provide the measuring stick. Each goal has indicators, so progress can be tracked rather than asserted.
They force the trade-offs into the open. Goal 8 wants growth; goal 13 wants emissions down. Naming both means governments have to explain how they will manage the tension.
That third job is the one worth writing about. The goals are not all mutually reinforcing. Building the infrastructure in goal 9 usually raises emissions in the short run, and the honest answer is that timing and technology decide whether the conflict is real or temporary.
Worked examples
WORKED EXAMPLE 1
Define sustainable development and explain why it requires more than economic growth. [4]
Step 1: the definition
Development that meets present needs without reducing the ability of future generations to meet their own.
Step 2: why growth alone fails
Growth raises output now, but it can do so by using up resources, which lowers the output available later.
Step 3: the three strands
Sustainable development requires economic, social and environmental progress together.
Step 4: name the failure
Growth plus social progress but no environmental care is equitable, not sustainable, because the resource base eventually gives out.
Growth is necessary but not sufficient
WORKED EXAMPLE 2
A low-income country plans to expand coal-fired electricity to power new factories. Using the SDGs, evaluate the plan. [10-style plan]
Goals it advances
Goal 7 (access to energy), goal 8 (decent work through new factory jobs), goal 9 (industry and infrastructure), and indirectly goal 1 as incomes rise.
Goals it damages
Goal 13 (climate action) and goal 3 (health, through local air pollution).
The economics underneath
Burning coal creates a negative externality of production, so the market price understates the true social cost.
Evaluation
The plan is equitable but not sustainable on the three-strand test. Whether that is acceptable depends on whether cleaner generation is genuinely affordable for this country and on how quickly it could switch later.
Judgement: defensible in the short run, but only with a stated plan to move off coalnaming specific goal numbers is what separates a strong answer here
💡 Exam tip
Learn the definition word for word. It appears constantly and is easy marks.
Use the three strands as a ready-made structure for any evaluation question.
Name specific goal numbers when a case study is given. Vague talk about “the SDGs” scores poorly.
Point out a conflict between two goals. It shows you understand trade-offs rather than lists.
Link the SDGs back to core theory: externalities, merit goods, market failure. That is what makes it economics rather than geography.
⚠ Common mix-up
Sustainable development is not only about the environment. It has an economic and a social strand too.
Growth and development are not the same thing. Growth is more output; development is better lives.
The goals are not legally binding. They are commitments, and progress varies enormously.
The SDGs apply to rich countries too, not just low-income ones.
Do not treat the goals as mutually reinforcing. Several of them pull against each other.
Up next: How Poverty and Sustainability Are Linked — the two-way relationship that explains why you cannot fix either one on its own.
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