Social sustainability is the dimension of sustainability concerned with whether a society’s institutions, relationships, and structures can meet the needs of current members without compromising the ability of future generations to meet theirs. While most people associate “sustainability” with recycling bins and carbon footprints, the social pillar covers territory that is arguably harder to pin down: equity, community cohesion, labor rights, public health, cultural continuity, and fair access to resources. It is also, by a wide margin, the least studied and most inconsistently defined of the three sustainability pillars, a gap that researchers have flagged repeatedly over the past two decades.
The Overlooked Pillar
The idea that sustainability rests on three pillars, sometimes called the “triple bottom line,” dates to the 1990s. The concept was meant to push organizations and governments to weigh environmental health, economic viability, and social well-being as equally important. In practice, that balance has never held. A bibliometric analysis of the triple bottom line literature found solid evidence that the framework as commonly used is insufficient to cover the full concept of sustainability, with social dimensions in particular still requiring more discussion to support the linkage between pillars.1PubMed Central. Future trends and guidance for the triple bottom line and sustainability: a data driven bibliometric analysis A separate systematic review noted something even more pointed: in studies of sustainable supply chain management from 2002 to 2014, the majority did not mention the social bottom line at all.2Revista de Administração Contemporânea. Open-access Triple Bottom Line toward a Holistic Framework for Sustainability: A Systematic Review
Why the neglect? Part of the answer is measurement. Carbon emissions can be counted in tons. Water use can be tracked in liters. But how do you quantify whether a neighborhood feels cohesive, or whether an industry’s workforce is treated fairly across three continents? The social pillar resists the tidy metrics that make environmental and economic sustainability easier to report on. That does not make it less important. It makes it easier to ignore.
Defining the Boundaries
Researchers have proposed various frameworks for what social sustainability actually includes. One influential approach organizes it around three criteria: social cohesion, equity, and safety.3Sustainable Development. A policy framework for social sustainability: Social cohesion, equity and safety Social cohesion refers to the bonds of trust, shared identity, and mutual support that hold communities together. Equity covers fair distribution of resources, opportunities, and political power. Safety means both physical security and protection from systemic risks like poverty or displacement.
Those three criteria show up, in different language, across virtually every attempt to define the concept. A city where only the wealthy can afford to live near parks is failing on equity. A company whose suppliers rely on forced labor is failing on safety. A community where neighbors do not know or trust one another is failing on cohesion. The framework is broad enough to cover everything from housing policy to corporate hiring practices, which is both its strength and the reason it sometimes feels vague.
When Green Projects Displace the People They Were Meant to Help
One of the starkest examples of what happens when social sustainability is ignored sits at the intersection of urban greening and housing. Cities around the world have invested heavily in parks, greenways, and waterfront restoration as part of environmental sustainability goals. Those investments often do improve air quality and biodiversity. They also tend to drive up nearby property values, pushing out the lower-income residents who arguably needed the green space most.
A systematic review of research on green gentrification found that most studies have focused on U.S. cases and that, despite displacement being the main concern of the phenomenon, it has not been well documented.4PubMed Central. How well do we know green gentrification? A systematic review of the methods The mechanisms through which greening leads to gentrification, particularly on the demand side, remain poorly understood. A quasi-experimental study of a high-profile green urban renewal project in China provided harder evidence for what many advocates have long suspected: the project significantly boosted nearby property rents, with the greatest impact on the lowest-rent properties. The researchers concluded that green urban renewal would probably result in displacement of the poor, and that green initiatives aimed at common well-being are more beneficial to the wealthy.5Cities. Green gentrification and who will benefit from green infrastructure regeneration? A quasi-experimental study in China
This is the social sustainability problem in miniature. An intervention that is environmentally sound can be socially destructive if no one asks who benefits and who bears the cost. Anti-displacement policies, community land trusts, and affordable housing commitments tied to green infrastructure projects are all tools that planners have proposed to bridge the gap, but they require the social pillar to be at the table from the start, not bolted on after rents have already climbed.
Environmental Justice and Unequal Exposure
The connection between environmental harm and social inequality has been studied intensely since the early 1980s, when grassroots movements in the United States began documenting that polluting facilities were disproportionately located near communities of color and low-income neighborhoods. Decades of research have since established inequitable exposure to pollution as a well-supported finding in the social sciences.6Journal of Economic Perspectives. Environmental Justice: The Economics of Race, Place, and Pollution
Environmental justice is, in many ways, the bridge between environmental and social sustainability. You cannot call a system environmentally sustainable if the pollution it generates is concentrated on the people least able to avoid it. And the harms are not abstract. Research on maternal and child health has shown that interventions grounded in environmental justice principles, using participatory research and systemic policy changes, can reduce both environmental risks and health inequities.7PubMed. Equity in Early Life: Advancing Environmental Justice for Maternal and Child Health
A related challenge is what happens to communities whose economies depend on fossil fuels as the world transitions to cleaner energy. The evidence base here is thinner than you might expect. Research has largely focused on describing the scope of the challenge and offering broad principles rather than proposing and evaluating specific policy interventions to increase economic resilience in those communities.8IOP Publishing. A research agenda for economic resilience in fossil fuel–dependent communities This is a significant blind spot. A “just transition” that leaves coal country or oil-dependent regions in economic freefall is not socially sustainable, even if it is environmentally necessary.
Corporate Responsibility and the Supply Chain Problem
For businesses, social sustainability shows up most concretely in how companies treat their workers, manage their supply chains, and engage with the communities where they operate. The past decade has seen a wave of legislation designed to force transparency in these areas. Norway’s Transparency Act, for example, requires companies above a certain size to conduct human rights due diligence across their supply chains. An assessment of company compliance found performance to be, at best, mediocre, with company accounts of due diligence failing to provide enough information about risks to human rights in their supply chains.9Global Policy. The Norwegian Transparency Act: An Assessment of Supply Chain Human Rights Due Diligence
That finding is worth sitting with. Even in a country with strong regulatory institutions and a legal mandate, companies struggled to deliver meaningful transparency. The challenge is partly logistical: global supply chains are dizzyingly complex, and a finished product may pass through dozens of subcontractors across multiple countries. But it is also partly motivational. When social sustainability reporting is treated as a compliance exercise rather than a genuine commitment, the reports tend to be vague enough to satisfy auditors without changing practices on the ground.
Inside the company itself, research has started to connect workplace culture directly to sustainability outcomes. A study of perceived diversity, equity, and inclusion practices found that they had a strong positive effect on employee well-being and on green performance, including environmental outcomes, because DEI improved innovation and stakeholder engagement in ways that aligned with broader sustainability targets.10Corporate Social Responsibility and Environmental Management. The Effect of Perceived Firm Diversity, Equity and Inclusion (DEI) on Employee Wellbeing and Green Performance: A Moderated Mediated Model A systematic review exploring the relationship between diversity and social sustainability concluded that while diversity is essential for social sustainability, its role in advancing it remains underexplored, and proposed reorienting diversity management research through a lens focused on the common good.11Corporate Social Responsibility and Environmental Management. Diversity and Social Sustainability: A Systematic Review and Integrative Framework for Advancing Socially Sustainable Diversity Management The overlap between how a company treats its people and how it treats the planet is not coincidental: both reflect whether leadership sees long-term well-being as a core business objective or as a side obligation.
Social Infrastructure and Why Libraries Matter
Social infrastructure is a term for the physical places where community life happens: libraries, parks, community centers, playgrounds, cafes, religious buildings. These are not just amenities. Research consistently links access to social infrastructure with measurable differences in well-being. A study of adults found that for every unit increase in perceived social infrastructure, subjective well-being was significantly higher. Having more social ties in the neighborhood also benefited well-being, while perceived crime dragged it down. Women, unemployed people, and renters all reported lower well-being than their counterparts.12Wellbeing, Space and Society. Social infrastructure, social cohesion and subjective wellbeing
The effects extend to children and adolescents. A study of young people in Germany found that access to fewer social infrastructure places was associated with higher odds of mental health problems. The association was especially pronounced for children experiencing high socioeconomic deprivation at the municipal level and for those with low individual socioeconomic status.13PubMed Central. Social Inequalities in the Association between Social Infrastructure and Mental Health: An Observational Cross-Sectional Analysis of Children and Adolescents in Germany In other words, the people who benefit most from having a library or a youth center nearby are the people who can least afford alternatives when those places close.
This makes social infrastructure a direct lever for social sustainability. When cities cut funding for community centers or allow public spaces to deteriorate, they are withdrawing a resource that disproportionately supports the most vulnerable residents. When they invest in those spaces, particularly in underserved areas, they are building the physical substrate of social cohesion.
Community Resilience and the Role of Trust
After natural disasters, pandemics, or economic shocks, communities with stronger social bonds tend to recover faster. The concept linking these observations is social capital: the networks, norms of reciprocity, and trust that enable collective action. Research on community resilience has found that general trust is a direct support for resilience capacity, while community involvement, shared knowledge, and social networks affect resilience through indirect pathways. Trustworthy relationships, both between individuals and community organizations, play a central role.14Environmental Science & Policy. How social capital influences community resilience management development
A broader review of the evidence on social capital and disaster recovery highlighted the critical role of social networks in both survival and recovery, laying out how the density of social ties in a neighborhood can shape outcomes as powerfully as the physical infrastructure.15American Behavioral Scientist. Social Capital and Community Resilience After Hurricane Katrina, for instance, neighborhoods with tighter community organizations and religious institutions tended to coordinate recovery efforts more quickly than areas with equivalent resources but weaker social networks. The disaster simply exposed what was already there, or not there.
This is one of the most practically consequential aspects of social sustainability: it is not just about fairness in abstract terms. Communities that invest in social cohesion are, in a very concrete sense, better prepared to withstand shocks. That investment might look like funding neighborhood associations, supporting local civic organizations, or making it easier for residents to participate in decision-making rather than concentrating authority in distant bureaucracies.
Civic Participation and Governance
Social sustainability depends on governance structures that actually include the people affected by decisions. This sounds obvious, but the gap between participatory rhetoric and participatory reality is wide. Research from Indonesia on civic participation in sustainable development initiatives found that how intensely people participate predicts how responsive governance becomes, how quickly institutions learn from policy outcomes, and how well sustainability programs perform across sectors. Deliberative forums, where citizens and administrators reason together about priorities, emerged as key connectors between community knowledge and government decision-making. Civil society organizations and digital engagement platforms expanded who could participate and how accountable the process was.16Journal of Human Interaction and Social Studies. Civic Participation and Governance in Sustainable Development Initiatives: Evidence from Indonesia
The takeaway is not that all governance should be plebiscitary. Most sustainability decisions are technical enough to require expert input. But when affected communities have no meaningful voice in, say, where a waste facility is sited, how public transit routes are drawn, or which neighborhoods receive green infrastructure upgrades, the outcomes tend to reproduce existing inequalities. Participation is not just a democratic nicety; it is a mechanism through which socially sustainable outcomes actually get produced.
Aging Populations and Intergenerational Fairness
One of the fastest-growing areas of social sustainability research concerns what happens as populations age. Across much of Europe, East Asia, and increasingly in parts of Latin America, the proportion of older adults is climbing while birth rates fall. A systematic review of social sustainability in aging populations found that this demographic shift restructures the fabric of societies: it places more weight on the needs of older individuals, potentially at the cost of younger ones, and challenges the redistributive mechanisms of pension systems and the organizational structures of care provision. The review raised pointed concerns about whether existing social arrangements can be maintained for future generations.17The Gerontologist. Social Sustainability in Aging Populations: A Systematic Literature Review
This is where social sustainability’s emphasis on intergenerational equity becomes most concrete. If a society’s pension and healthcare systems were designed for an era when there were five working-age adults for every retiree, and there are now two, something has to give. The socially sustainable response is not simply to cut benefits or raise taxes but to redesign systems so that the costs and benefits of longevity are shared fairly across generations. That might mean rethinking retirement ages, investing in preventive health to keep people active longer, or valuing caregiving work in economic terms rather than treating it as invisible labor.
Care Work and the Solidarity Economy
Speaking of invisible labor: care work is one of the largest and least recognized pillars of any functioning society. Child care, elder care, domestic labor, and community health support are overwhelmingly performed by women, often informally and without pay. When it is paid, the wages tend to be low and the conditions precarious, with migrant women overrepresented in the workforce. An analysis of women workers’ initiatives within the social and solidarity economy argued that a just socio-ecological transition requires transforming the care system to ensure the sustainability of human life, which means recognizing and revaluing unpaid care work and improving conditions in a sector characterized by the overwhelming contribution of women.18Revista de EconomÃa Mundial. Women Workers’ Initiatives in the Field of the Social and Solidarity as a Space for Transforming the Domestic Care System: Potential and Challenges in the Ibero-American Sphere
The social and solidarity economy, which includes cooperatives, mutual aid organizations, and community-based enterprises, represents an alternative model that some researchers see as promising for advancing social sustainability in this sector. Worker-owned care cooperatives, for instance, can offer better wages and working conditions than private agencies while keeping services affordable, because they strip out profit extraction. These are still small-scale experiments in most countries, and they face real limitations in financing and regulatory support. But they illustrate a principle central to social sustainability: that economic arrangements can be redesigned to serve human needs rather than simply generating returns.
The Digital Divide as a Social Sustainability Challenge
As cities and governments invest in smart infrastructure, a new front in social sustainability has opened around digital inclusion. Digital tools create real opportunities for education, civic engagement, and access to services. But those opportunities are not evenly distributed. Barriers like limited infrastructure, financial constraints, gaps in digital literacy, and outright social exclusion continue to prevent full digital inclusion for older adults, low-income households, migrants, and rural communities.19Annual International Conference on Digital Government Research. Digital Inclusion and Social Cohesion in Smart Cities: Overcoming Barriers in the Digital Age
When a city moves its public services online without ensuring that all residents can access them, it creates a new layer of exclusion on top of existing ones. An elderly resident who cannot navigate a digital portal to renew a housing subsidy, a migrant family without reliable broadband, a person who cannot afford a laptop, all of these are social sustainability failures wearing a technological mask. The research points toward the need for cross-sectoral strategies: public Wi-Fi, digital literacy programs, multilingual interfaces, and in-person alternatives that remain available even as digital options expand. Treating digital inclusion as a social equity issue rather than a technology rollout problem is the shift that makes these strategies coherent.
Cultural Heritage and Community Ownership
Social sustainability also extends to the continuity of cultural practices, traditions, and identity across generations. Cultural heritage preservation, when driven by community engagement rather than imposed by outside authorities, fosters a sense of ownership that strengthens social bonds and promotes cultural continuity.20Indonesian Journal of Studies on Humanities, Social Sciences, and Education (IJHSED). Cultural Heritage Preservation Through Community Engagement: A New Paradigm for Social Sustainability The emphasis on community-driven approaches matters because top-down preservation efforts, where a government agency decides what is worth saving and how, can inadvertently freeze culture into museum-piece versions of itself, stripping it of the living participation that gave it meaning.
In Indigenous communities, this dynamic is especially charged. Language revitalization programs, for example, succeed most reliably when they are led by community members and embedded in daily life rather than confined to classrooms. The same principle applies to traditional ecological knowledge, food practices, and artistic traditions. When communities have genuine authority over their own cultural preservation, the effort reinforces social cohesion. When they do not, it can become another form of extraction, where outside institutions benefit from cultural assets while the source community’s voice is sidelined. The pattern echoes across nearly every dimension of social sustainability: who decides, who benefits, and who bears the cost are the questions that separate sustainable arrangements from unsustainable ones.