Marginalized groups are populations that are systematically pushed to the edges of social, economic, and political life because of characteristics they hold or identities they belong to. The term covers a wide range of people, including racial and ethnic minorities, Indigenous peoples, LGBTQ+ individuals, people with disabilities, women in certain contexts, religious minorities, immigrants and refugees, older adults, people living in poverty, and those with neurodevelopmental differences. What ties these otherwise diverse populations together is not a single shared trait but a shared structural position: they face barriers to full participation in the institutions and opportunities that shape everyday life.
What Marginalization Actually Means
Marginalization is not simply being unpopular or outnumbered. A large-scale scoping review spanning fifty years of research defined social marginalization as a context-dependent process of “othering,” where certain individuals or groups are systematically excluded based on prevailing societal norms and values, resulting in measurable disadvantage.1Humanities and Social Sciences Communications. Social marginalization: A scoping review of 50 years of research That definition highlights two things worth noting. First, marginalization is a process, not a fixed state. It is produced and maintained by specific social arrangements. Second, it is context-dependent: a group that holds power in one society or era can be marginalized in another.
Research on social exclusion reinforces this framing. Exclusion is not a single condition but a structured process formed by interconnected social and institutional arrangements, limiting opportunities for vulnerable groups to engage fully in education, employment, healthcare, and decision-making.2Studi Ilmu Sosial Indonesia. Social Exclusion and Marginalization of Vulnerable Groups in Social Structures In practical terms, this means marginalized groups do not just feel excluded; they are materially locked out of systems that determine quality of life.
Racial and Ethnic Minorities
Race-based marginalization is among the most thoroughly documented forms. In the United States, structural racism has operated through residential segregation, unfair lending practices, schools funded by local property taxes (which track neighborhood wealth), biased policing and sentencing, and voter suppression policies.3PubMed. Systemic And Structural Racism: Definitions, Examples, Health Damages, And Approaches To Dismantling These are not isolated problems but interlocking systems that reinforce one another. Racially segregated housing, for instance, creates racial isolation that cascades into worse opportunities, smaller networks, lower-quality education, less accumulated wealth, poorer health, and harsher legal treatment.4PubMed Central. Systemic racism: individuals and interactions, institutions and society
For African Americans specifically, the effects of structural racism trace directly back to slavery and have never fully resolved. Health disparities, economic disadvantages, and ongoing segregation continue to produce trauma across generations.5PubMed Central. The Traumatic Impact of Structural Racism on African Americans The mechanisms are not abstract. Higher chronic stress levels and experiences of racial discrimination have been linked to shortened telomeres, which are biological markers of accelerated aging, while lower income and chronic stress are associated with increased allostatic load, a measure of cumulative physiological wear and tear.6PubMed. Disparities in allostatic load, telomere length and chronic stress burden among African American adults: A systematic review Marginalization, in other words, gets under the skin.
Indigenous Peoples
Indigenous populations worldwide occupy a distinct position among marginalized groups. Their marginalization is rooted in settler colonialism: the dispossession of land, the deliberate disruption of cultures, and the imposition of foreign governance systems. In North America, research has documented a near-total aggregate reduction in Indigenous land density and spread over the course of colonization. Indigenous peoples were forced onto lands that are more exposed to climate-change risks and hazards and less likely to sit above valuable subsurface oil and gas resources.7PubMed. Effects of land dispossession and forced migration on Indigenous peoples in North America The land that remains is, quite literally, less valuable and more vulnerable.
The health consequences are stark. Indigenous people suffer earlier death and more frequent and severe disease than their settler counterparts, a pattern that persists across different settler-colonized countries and across time.8PubMed Central. Because its power remains naturalized: introducing the settler colonial determinants of health This is not a matter of individual health behaviors; it reflects the enduring structural consequences of land theft, cultural destruction, and political disempowerment.
Sexual and Gender Minorities
LGBTQ+ individuals face marginalization through legal discrimination, social stigma, and exclusion from institutions ranging from marriage (historically) to healthcare and housing. Media portrayals often simplify and stigmatize LGBTQ+ individuals, contributing to psychological distress and reinforcing systemic exclusion.9Communica : Journal of Communication. Digital Resistance and Representation: Media Narratives of Marginalized Groups in a Global Context
One framework that helps explain the health toll of this exclusion is minority stress theory, which describes how the chronic experience of stigma produces measurable physiological and psychological harm. Research on sexual minority men found that racial and ethnic stigma within LGBTQ+ spaces and LGBTQ+ stigma in one’s neighborhood were both associated with greater stress, regardless of the individual’s racial or ethnic background.10PubMed Central. Multiple Minority Stress and LGBT Community Resilience among Sexual Minority Men Recent work has extended this to examine biological mechanisms directly. Intersectional discrimination experiences among sexual and gender diverse people were positively associated with allostatic load after controlling for age, meaning that both major discriminatory events and cumulative daily experiences independently contribute to physiological wear and tear.11PubMed. Intersectional stigma, health behaviors, and allostatic load among sexual and gender diverse people
People with Disabilities
Roughly one billion people worldwide live with some form of disability, and their marginalization operates through a combination of stigmatizing attitudes, inaccessible environments, and institutional barriers such as a lack of inclusive legislation. These exclusions result in lower participation in education, employment, and policymaking. Consequently, people with disabilities tend to have lower educational attainment, poorer health, fewer economic opportunities, and increased poverty risk.12PubMed Central. Effectiveness of interventions for improving social inclusion outcomes for people with disabilities in low‐ and middle‐income countries: A systematic review The barriers are often mundane but devastating: a building without a ramp, a website without screen-reader compatibility, a job interview that penalizes atypical communication styles.
Neurodevelopmental differences occupy an increasingly visible corner of disability-related marginalization. People with conditions like autism, ADHD, and dyslexia have historically been labeled in derogatory terms and segregated. That legacy continues in subtler forms: many schools, workplaces, and public services still fail to accommodate neurodiverse individuals, blocking access to resources and opportunities.13Loreto College Academic Press. Neurodiversity And Social Exclusion: Understanding Marginalization of Neurodevelopmental Differences The neurodiversity movement has pushed back by framing these differences as natural variations in human cognition rather than deficits, but practical accommodation still lags behind the rhetoric in most settings.
Women and Gender-Based Marginalization
Women’s marginalization operates differently from that of many other groups because women are not a numerical minority in any population. Their exclusion is driven by gender roles and institutional structures that devalue their labor, limit their authority, and expose them disproportionately to economic instability. Research on the COVID-19 pandemic illustrated this vividly: because women’s jobs tend to be part-time, lower-income, and less secure than men’s, women assumed the obligations of increased caregiving at a much higher rate during lockdowns, rendering them especially susceptible to both short- and long-term economic insecurity.14International Journal of Wellbeing. COVID-19, gender inequality, and the responsibility of the state
Workplace dynamics compound the problem. Research on marginalized women’s employment experiences has identified structural and organizational barriers that limit pay equity, alongside a hidden social element in which cultural challenges at work and early employment experiences shape career trajectories in ways that are hard to quantify but consistently harmful.15Emerald Insight. Pay equity and marginalized women These barriers are especially pronounced for women who also belong to racial or ethnic minorities, which is where the concept of intersectionality becomes essential.
Religious Minorities
Religious marginalization often flies under the radar compared to race- or gender-based discrimination, but it is widespread. In a study of Australian youth, about 27 percent of students reported experiencing direct religious discrimination, with far greater proportions reported by students identifying as Muslim, Buddhist, Hindu, or belonging to other minority faiths compared to those identifying with the dominant “no religion” group.16PubMed Central. The association between experiences of religious discrimination, social-emotional and sleep outcomes among youth in Australia Religious discrimination in youth is linked to worse social-emotional and sleep outcomes, effects that compound over time.
What makes religious marginalization particularly insidious is how it interacts with broader social anxieties. Experimental research in Germany found that native-born participants who had recently experienced social exclusion reported greater prejudice against openly observant Muslims, stronger approval for stricter immigration legislation, and more agreement with the view that immigrants are financial burdens. The mechanism appeared to be a threatened sense of personal control, which in turn led to stronger rejection of stigmatized outgroups.17Group Processes & Intergroup Relations. Social exclusion and xenophobia: Intolerant attitudes toward ethnic and religious minorities In other words, people who feel economically or socially insecure become more likely to direct hostility toward religious minorities, creating a feedback loop.
Immigrants, Refugees, and Stateless Persons
Migrants face a distinctive form of marginalization because their legal status within a country often determines the scope of their exclusion. Immigration policies and border enforcement practices are themselves a major determinant of health, with particularly severe effects on mental health outcomes among undocumented immigrants, refugees, and other vulnerable migrants.18PubMed Central. Evaluating the Impact of Immigration Policies on Health Status Among Undocumented Immigrants: A Systematic Review But the problem extends beyond those without documentation. Immigrants in “liminal” legal statuses, meaning they are legally present but lack permanent residency, also face blocked mobility, persistent fear of deportation, instability, and confusion about their rights.19Law & Policy. Incomplete Inclusion: Legal Violence and Immigrants in Liminal Legal Statuses
Healthcare access is one of the most tangible flashpoints. A systematic review of barriers to healthcare among immigrants in European countries highlighted that undocumented immigrants have the most critical and precarious healthcare status, but it also noted that research on their specific experiences remains underdeveloped due to the difficulty of reaching this population through standard sampling methods.20PubMed. Immigrants’ self-perceived barriers to healthcare: A systematic review of quantitative evidence in European countries The people whose health needs are most urgent are the hardest to study and, by extension, the hardest to serve through evidence-based policy.
Older Adults
Age-based marginalization, or ageism, is sometimes treated as a minor social irritant compared to racism or sexism, but its effects are measurable and serious. A review of ageism in the United States found that those who were older, less educated, and of lower socioeconomic status reported more ageism than their counterparts. The socioeconomic finding was the most consistent: every study that examined the relationship between lower socioeconomic status and ageism found a connection.21PubMed Central. Differences and Disparities in Ageism Affecting Older US Adults: A Review Ageism can manifest as being passed over for jobs, patronized by healthcare providers, or excluded from conversations about technology and culture. For older adults who are also poor or members of racial minorities, ageism layers onto existing disadvantages rather than replacing them.
Where Poverty and Place Intersect
Socioeconomic class is both a form of marginalization in its own right and an amplifier of every other form. Research on educational achievement in Chile found that children living in the most marginalized districts scored measurably lower on standardized tests than those in wealthy districts, even after accounting for a range of other factors. The gap between the most and least marginalized neighborhoods was equivalent to roughly two-thirds of the gap between private and public schools.22Socio-Economic Review. Spatial divisions of poverty and wealth: does segregation affect educational achievement? Where you grow up shapes what you can become, and marginalized communities are disproportionately concentrated in places with fewer resources.
The spatial dimension of marginalization extends to environmental exposure. Communities of color and poor neighborhoods are disproportionately exposed to air pollution, a pattern known as environmental injustice.23PubMed Central. Structural Racism as an Environmental Justice Issue: A Multilevel Analysis of the State Racism Index and Environmental Health Risk from Air Toxics For children, environmental racism poses a particularly significant threat: disproportionate exposure to hazards is linked to adverse health outcomes that can affect development and life trajectory.24PubMed Central. Environmental Racism and Child Health A child growing up near an industrial site in a low-income neighborhood is not just economically disadvantaged; they are breathing air that is quantifiably worse.
How Overlapping Identities Compound Disadvantage
One of the most important insights in marginalization research is that disadvantage rarely operates along a single axis. A person can be a low-income, elderly, Black woman simultaneously, and the experience of occupying all those positions at once is not just the sum of its parts. A large study from a U.S. integrated health system found that patterns of social risk and need were complex and often counterintuitive. Groups with higher incomes and older ages generally had lower social risk, but this pattern was not consistent across racial and ethnic groups. Lower-income White respondents often had lower risk and need than higher-income respondents from racially minoritized groups. Among adults over 60 in racial and ethnic minority groups, particularly African American or Black and multiracial respondents at low incomes, risk and need were disproportionately higher than among their White counterparts of the same age and income.25AJPM Focus. Intersectional Analysis of Social Risk and Need Among a Large Representative Sample of Adults From an Integrated Health System in the U.S.
That finding is worth sitting with. It means that a simple income-based safety net would miss people whose marginalization is driven by race, and a race-based intervention would miss people whose marginalization is driven by poverty and age. Effective policy has to account for the way these factors interact, not just add them up. Research on chronic stress has documented how this works biologically: pregnant women from marginalized communities are disproportionately exposed to discrimination, historical trauma, and acculturation stress, and these forms of chronic stress can affect the health of both the mother and her child, embedding disadvantage across generations.26Child Development Perspectives. Biological Embedding of Chronic Stress Across Two Generations Within Marginalized Communities
Political Exclusion and the Feedback Loop
Marginalized groups are not just underserved by policy; they are often excluded from the political processes that create policy. Barriers to voting in the United States are disproportionately concentrated among marginalized communities, and these barriers produce less representative government and less inclusive public policy.27PubMed Central. Addressing Health Disparities Through Voter Engagement This creates a feedback loop: communities that are already underserved have less political voice, which leads to policies that continue to underserve them, which further reduces their engagement.
Research on electoral disenfranchisement has identified three broad categories of barriers. Structural barriers include bureaucratic obstacles, geographic isolation, legal disqualification (such as felony disenfranchisement laws), and digital exclusion. Psychological and social barriers include fear of reprisal, political disillusionment, and community apathy. But the picture is not entirely bleak: resistance and agency also emerge through informal political organizing, symbolic acts of voting, and peer civic education.28Journal of Historical Research, Law and Policy. Narratives of Electoral Disenfranchisement in Marginalized Populations Marginalized people are not passive recipients of exclusion; many fight back through whatever channels are available.
Language as a Mechanism of Exclusion
One often-overlooked dimension of marginalization is linguistic. Speaking a minority language, a non-standard dialect, or an accented version of the dominant language can mark someone as an outsider and trigger discrimination. Research on dialect-based discrimination in China found that in dialect-dominant regions, language functions as a social boundary that determines who belongs and who does not. Fluency in the local dialect marks insider status, while reliance on Mandarin, the national language, often signals outsider status and triggers social exclusion.29Humanities and Social Sciences Communications. Navigating linguistic boundaries: exploring dialect-based discrimination and microaggressions in China This dynamic plays out across the world wherever linguistic diversity exists: in immigrant communities navigating English or French or German, in regions with Indigenous languages competing with colonial ones, and in professional settings where certain accents are coded as less competent.
Linguistic marginalization is easy to dismiss as mere snobbery, but it has material consequences. If your dialect or accent leads employers to underestimate you, teachers to lower expectations for your children, or healthcare providers to spend less time explaining your treatment, your language has become a structural barrier no different in effect from a segregated neighborhood or an inaccessible building.
What Affirmative Policies Can and Cannot Do
Given the depth and interconnectedness of marginalization, there is ongoing debate about which policy tools actually work. Experimental evidence on affirmative action offers some encouraging data: in controlled settings, the introduction of a gender quota significantly reduced discrimination against women without hurting overall performance.30Elsevier. Does affirmative action reduce gender discrimination and enhance efficiency? New experimental evidence That finding counters one of the most common objections to quota systems, namely that they sacrifice quality for representation. At least in the context studied, they did not.
But quotas and affirmative action target only one layer of the problem. They can help marginalized individuals gain entry to institutions, but they do not automatically change the culture within those institutions, the neighborhoods people go home to, or the accumulated disadvantage they carry from childhood. The most effective approaches tend to be multilayered, addressing not just access but the structural conditions, from housing to environmental exposure to healthcare delivery, that produce and maintain marginalization in the first place. Understanding who marginalized groups are is a necessary starting point, but the harder and more consequential question is always what keeps them marginalized and what it would take to change that.