Breaking down the question

The question is in two parts. First, a conceptual demand — what do you understand by sustainable development? — inviting a definition and its sociological significance. Second, a specific factual demand — a discussion of the elements of sustainable development as set out in the 2015 Sustainable Development Goals.

The verb discuss asks for more than a bare listing of goals. The examiner wants you to organise the seventeen goals into their underlying elements or dimensions and reflect on what makes this framework distinctive as a model of social change.

Two anchors are essential:

  • The Brundtland definition (1987) — development that meets present needs without compromising the ability of future generations to meet theirs — with its core idea of intergenerational equity.
  • The three pillars — economic, social and environmental — around which the SDGs are built.

Because the topic sits under social change, connect it to debates on development, growth and its limits, drawing on the note on development and dependency.

How to approach it

Open with the Brundtland definition and unpack its two key ideas — needs and limits — then note how sustainable development reconciles growth with ecology and equity. This settles the first part.

For the second part, present the 2015 SDG framework — seventeen goals adopted in Agenda 2030, succeeding the Millennium Development Goals. Rather than reciting all seventeen, cluster them into their constituent elements: economic, social, environmental, and the cross-cutting themes of peace, justice and partnership. This shows analytical control.

Close sociologically. Evaluate the framework as a vision of inclusive, planned social change — its strength in being universal and multidimensional, and the critiques regarding measurement, funding and the tension between growth and ecology. This lifts the answer above a UN-brochure summary.

Model answer

Sustainable development is most influentially defined by the 1987 Brundtland Commission report, Our Common Future, as development that meets the needs of the present without compromising the ability of future generations to meet their own needs. Two ideas sit at its heart: the priority of essential needs, especially of the world's poor, and the limits that technology and social organisation impose on the environment's capacity to meet present and future demands. Its central ethical principle is intergenerational equity — fairness across generations — coupled with intragenerational equity within the present generation.

Sociologically, sustainable development marks a decisive shift away from purely economic, growth-centred models of progress towards a multidimensional view that integrates economy, society and ecology. It responds to the recognition that unchecked industrial growth generates ecological crisis, inequality and social dislocation.

The Sustainable Development Goals, adopted by the United Nations in 2015 as part of Agenda 2030, translate this vision into seventeen goals and one hundred sixty-nine targets, succeeding the earlier Millennium Development Goals. Their elements can be grouped into interrelated dimensions.

The economic element. Several goals target material well-being and livelihoods — ending poverty (Goal 1) and hunger (Goal 2), promoting decent work and inclusive economic growth (Goal 8), building resilient infrastructure and fostering innovation (Goal 9), and reducing inequalities within and between countries (Goal 10). The aim is growth that is inclusive rather than concentrated.

The social element. A cluster of goals addresses human development and social justice — good health and well-being (Goal 3), quality education (Goal 4), gender equality (Goal 5), and clean water and sanitation (Goal 6). These reflect a capability orientation, resonant with Amartya Sen's view of development as the expansion of human freedoms, not merely income.

The environmental element. The framework's defining contribution is its ecological seriousness — affordable and clean energy (Goal 7), sustainable cities and communities (Goal 11), responsible consumption and production (Goal 12), climate action (Goal 13), and the protection of life below water (Goal 14) and life on land (Goal 15). This is the environmental sustainability pillar, guarding the resource base for future generations.

The institutional and partnership element. Finally, cross-cutting goals address the conditions for change — peace, justice and strong institutions (Goal 16) and partnerships for the goals (Goal 17). These recognise that development is impossible without good governance, the rule of law and global cooperation in finance, technology and trade.

Underlying these clusters are the three pillars — economic, social and environmental sustainability — which the SDGs seek to balance rather than trade off against one another. Distinctive features of the 2015 framework include its universality (applying to developed and developing nations alike, unlike the MDGs), its integrated character, and its explicit pledge to leave no one behind.

As a model of social change, the SDG framework represents planned, global, inclusive transformation. Its strengths are its comprehensiveness and moral ambition. Yet critics note real tensions: the difficulty of measuring progress across so many targets, chronic gaps in financing, the persistent contradiction between economic growth and ecological limits, and the reliance on voluntary national commitment without enforcement. For sociologists, sustainable development remains a contested but indispensable vocabulary for thinking about equitable and durable change.

Examiner's perspective

Examiners expect the Brundtland definition and the idea of intergenerational equity in the opening — its absence marks a weak conceptual grasp. On the second part, the reward lies in organising the goals into elements or the three pillars, not in listing all seventeen mechanically.

The strongest scripts treat the SDGs as a model of social change and offer a balanced critique — financing gaps, measurement problems, the growth-versus-ecology tension. Linking the social element to Sen's capability approach signals wider reading. A brochure-style recitation of goals, by contrast, stays firmly in the middle band.