racial segregation

Classification basis and contestation

Record the categories used, who assigned them and disagreements or changes that affect interpretation.

1. Which racial classifications are relevant to the alleged separation, and do they reflect self-identification, imposed categories or others' perceptions? definition
2. Who created each classification, for what purpose, and how were mixed, changing, contested or missing classifications handled? provenance

Relevant population and opportunities

Record the assessment boundary and the accessible placements or services against which observed separation is interpreted.

1. What population, period and geographic or institutional boundary define this case, including people excluded before enrolment, admission or entry? boundary
2. Does separation occur between institutions or neighbourhoods, within them through tracks, entrances or schedules, or at several levels? definition

Racially structured allocation

Record evidence connecting explicit racial rules or indirectly operating criteria to separation.

1. Which admission, assignment, zoning, lending, hiring or service rules may separate racialised groups, and how are those rules applied? definition
2. What records or observations connect the rule or decision to separation, and what evidence supports or challenges competing explanations? provenance

Substantive access and exit

Record available alternatives and barriers such as intimidation, price, transport, information or exclusionary gatekeeping.

1. Could affected people realistically enter other settings or leave the separated arrangement, and at what financial, social or safety cost? measurement
2. What evidence distinguishes meaningful preference or community association from adaptation to exclusion or anticipated hostility? boundary

Dimension-specific separation

Record separate measures for the dimensions of separation relevant to the setting.

1. Which dimensions matter here: uneven distribution, isolation, potential contact, spatial concentration or exclusion from particular opportunities? definition
2. What does each selected measure show, using which denominator and comparison, and how is it affected by relative group size? measurement

Robustness of separation assessment

Record sensitivity to boundaries, category definitions, missing observations and the distinction between potential and actual contact.

1. Does the conclusion change when examining classrooms instead of schools, buildings instead of districts, or other relevant smaller and larger units? measurement
2. How were the data collected, whose experience is absent, and do the observations measure shared presence, actual interaction or only residential or institutional location? provenance

Consequences with causal limits

Record material and social consequences while separating reported experience, measured association and supported causal attribution.

1. How do the separated settings differ in resources, service quality, exposure to hazards, mobility, voice or treatment, and for whom? measurement
2. Which consequences are attributed to separation by affected people or research, and what evidence distinguishes causal effects from accompanying inequalities? provenance

Maintenance and displacement pathways

Record evidenced links across time and settings, including whether apparent reductions conceal displacement.

1. What evidence connects earlier exclusions or linked systems, such as housing and school assignment, to the current separation? provenance
2. Does change over time reflect wider access and shared participation, or changing categories, boundaries, displacement or movement into separate internal tracks? measurement

Mechanism-matched response

Record which actor can change the arrangement and how a proposed remedy addresses its causes.

1. Which actor has authority to change the relevant allocation rule, barrier or resource decision, and which current jurisdiction-specific obligations require verification? action
2. Which response addresses the evidenced mechanism, and how have affected people's priorities informed the choice? action

Substantive desegregation outcomes

Record whether formal change produces sustained access and participation without concealed resegregation.

1. What baseline, follow-up period and indicators would demonstrate changes in barriers, separation, resources and lived participation? measurement
2. What monitoring and corrective action will address retaliation, displacement, unequal travel burdens or separation recreated within nominally integrated settings? action

Kinds and varieties

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

• De jure segregation (statute, ordinance, or court-enforced 'separate but equal' rules)
• De facto or market-produced segregation (patterns that persist without an explicit racial statute)
• Residential or spatial segregation (neighbourhoods, townships, reserves, gated or restricted areas)
• School and educational segregation (dual systems, catchment design, tracking)
• Occupational and workplace segregation (job queues, colour bars, racially typed occupations)
• Public-accommodations segregation (transport, hospitals, amenities, restrooms, places of assembly)
• Hypersegregation (high scores on several spatial dimensions at once: evenness, isolation, clustering, concentration, centralization)
• Apartheid-type regimes (a comprehensive legal-political system of racial classification, territorial assignment, and political exclusion)

1. Which of these kinds and varieties hold for the sense of racial segregation this model covers, and on what evidence? provenance

Identifiers and schemes

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

• Wikidata - Q59816 - Item for racial segregation as a social and legal practice; apartheid is a distinct item (Q190086).
• UN Treaty Series / ICERD - 660 UNTS 195; Article 3 - The treaty article that names racial segregation and apartheid as obligations of prohibition and eradication.
• Library of Congress Subject Headings - Segregation; Race discrimination; Apartheid - Bibliographic headings that split spatial/institutional separation from the broader heading for racial discrimination.

1. Which of these identifiers and schemes hold for the sense of racial segregation this model covers, and on what evidence? provenance

Standards and regulation

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

• International Convention on the Elimination of All Forms of Racial Discrimination (ICERD, 1965) - United Nations; Article 3 on racial segregation and apartheid
• UN Committee on the Elimination of Racial Discrimination, General Recommendation XIX (1995) - interprets Article 3 to cover segregation produced by housing markets and private action
• International Convention on the Suppression and Punishment of the Crime of Apartheid (1973) - United Nations
• Rome Statute of the International Criminal Court, Article 7(1)(j) and 7(2)(h) - crime against humanity of apartheid
• UNESCO Declaration on Race and Racial Prejudice (1978) - UNESCO
• Civil Rights Act of 1964 (Titles II, VI, VII) and Fair Housing Act 1968 (Title VIII) - United States Congress
• Brown v. Board of Education, 347 U.S. 483 (1954), and the later dismantling of Plessy v. Ferguson 'separate but equal' - U.S. Supreme Court
• Group Areas Act 41 of 1950, Population Registration Act 30 of 1950, and related apartheid statutes (repealed) - Union/Republic of South Africa; successor equality clause in the 1996 Constitution

1. Which of these standards and regulation hold for the sense of racial segregation this model covers, and on what evidence? provenance

Real-world use

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

• School assignment, district lines, and desegregation or resegregation litigation in public education systems
• Housing finance, appraisal, steering, and municipal zoning that sort occupancy by race even after racial covenants were struck down
• Census and urban-analytic practice: computing dissimilarity, isolation, and related indices from tract or small-area counts
• Human-rights reporting under ICERD (periodic state reports and CERD concluding observations) that treat residential and school patterns as Article 3 issues
• Historical legal regimes (Jim Crow ordinances; South African pass laws and Group Areas; colonial 'native' locations) reconstructed in archives, land-restitution claims, and truth commissions
• Public-health and environmental assessment of exposure when hazardous land uses concentrate in racially assigned neighbourhoods

1. Which of these real-world use hold for the sense of racial segregation this model covers, and on what evidence? provenance

Typical measurements

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

• Index of dissimilarity (evenness of two groups across areal units) - 0-30 low, 30-60 moderate, 60-100 high; many large U.S. Black-White metro areas have sat in roughly 50-80 over recent decades - index points on a 0-100 scale (sometimes reported 0-1)
• Isolation index (probability a group member shares a unit with another of the same group) - 0-1; values above about 0.70 are treated as high isolation in the Massey-Denton literature - probability (0-1)
• Exposure (interaction) index - 0-1, falling as isolation rises - probability (0-1)
• Hypersegregation criterion - high on at least four of five spatial dimensions (evenness, exposure, clustering, concentration, centralization) - count of dimensions (0-5)
• Share of a group in racially identifiable schools or neighbourhoods - jurisdiction-specific; often reported as percent in 90%+ same-group schools or tracts - percent

1. Which of these typical measurements hold for the sense of racial segregation this model covers, and on what evidence? provenance

Failure modes and hazards

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

• Entrenchment of unequal school quality, municipal services, and household wealth across racially assigned space, reproducing disadvantage after formal bans
• Health and environmental harm where pollution, crowding, or under-provision track segregated areas
• Political exclusion and distorted representation when electoral geography maps onto racial settlement
• State or private violence used to create, police, or restore separation (forced removal, intimidation, restrictive covenants, pass systems)
• Measurement failure: unstable racial categories, gerrymandered areal units, and undercount that make indices incomparable across places or years
• Legal failure: formally colour-blind rules that leave assignment mechanisms (finance, catchment, criminal records, informal steering) intact
• Social conflict when desegregation is attempted without addressing housing, transport, and fiscal bases that hold the pattern in place

1. Which of these failure modes and hazards hold for the sense of racial segregation this model covers, and on what evidence? provenance

Regional variation

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

• United States: 'Jim Crow' de jure systems in the South versus northern and western de facto patterns built through covenants, FHA/HOLC redlining, and suburban zoning; the vocabulary of 'separate but equal' is local to this legal history
• South Africa: apartheid named a total system (racial register, Group Areas, homelands, influx control), not only facility separation; post-1994 law forbids it while urban spatial form still reflects it
• Brazil and much of Latin America: republican constitutions rarely copied U.S.-style racial statutes, yet extreme residential and school sorting by colour is widely documented and often denied under a 'racial democracy' frame
• Australia and settler colonies: protection-era reserves, missions, and town-camp controls over Aboriginal and Torres Strait Islander people; different legal vocabulary from 'Jim Crow'
• Malaysia and Singapore: colonial plural-society settlement and, in Singapore, later ethnic housing quotas designed to prevent residential clustering rather than to impose it
• Naming: 'apartheid' is a technical international-crime term and a South African proper name; applying it to other countries is legally and historically contested

1. Which of these regional variation hold for the sense of racial segregation this model covers, and on what evidence? provenance

Neighbouring kinds and how to tell them apart

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

• Racial discrimination (unequal treatment) - Discrimination can occur inside mixed settings (pay, policing, hiring) without spatial or institutional separation; segregation is the assignment to separate places or systems. ICERD treats both, but Article 3 is the segregation/apartheid clause.
• Apartheid (international crime / South African regime) - Apartheid requires an institutionalized regime of systematic domination by one racial group over another, not merely separate facilities. Test: presence of a comprehensive legal-political architecture of classification, territorial assignment, and denial of political rights, as in the 1973 Convention and Rome Statute, rather than a dissimilarity index alone.
• Ethnic or immigrant enclave (voluntary clustering) - Enclaves can form from in-group preference, chain migration, and amenities. Test: whether exit, entry, and access to equivalent housing, schools, and public goods are open in practice; constraint, steering, violence, or law indicates segregation rather than clustering.
• Caste exclusion and untouchability - Caste is a hereditary status order with its own ritual and occupational rules; it is not a racial taxonomy even when spatial separation looks similar. Test: the classification principle in the governing law or custom (birth-ascribed caste versus race/colour categories).
• Land-use zoning and class sorting - Ordinary zoning sorts by density, use, and price. It becomes an instrument of racial segregation when the design or enforcement tracks racial classification (explicit racial zones historically; exclusionary lot-size and occupancy rules with racially disparate assignment today). Test: whether the sorting rule is race as such, or a facially economic rule whose racial effect is incidental and not steered.
• Occupational sex segregation - Same index toolkit (dissimilarity across jobs), different protected axis. Test: the classifying attribute is sex/gender versus race.
• Colonial partition, reserves, or occupation lines - Imperial or military territorial control can produce racialized space without a domestic 'separate but equal' doctrine. Test: whether the operative authority is a racial civil-status code inside one polity, or a colonial/military boundary between polities or legal persons.

1. Which of these neighbouring kinds and how to tell them apart hold for the sense of racial segregation this model covers, and on what evidence? provenance