2,229 articles
Occupy movement
Occupy movement, also called Occupy Wall Street, was a decentralized 2011 protest movement against economic inequality, occupying Zuccotti Park on September 17, 2011, using consensus-based General Assemblies and the slogan "We are the 99%".
Occupy Wall Street
Occupy Wall Street (OWS) was a leaderless protest movement begun September 17, 2011 in Zuccotti Park, New York, called by Adbusters, protesting inequality as the 99 percent; it spread to hundreds of sites, shifted political discourse, and collapsed by 2012.
Olive Morris
Olive Elaine Morris (1952–1979), Jamaican-born British activist in Brixton; British Black Panthers member, co-founder of the Brixton Black Women's Group and OWAAD, squatter at 121 Railton Road, died of non-Hodgkin lymphoma at 27.
Olive theory
Olive theory: a TikTok-viral compatibility idea from the How I Met Your Mother pilot, claiming a couple works when one loves and one hates olives; unscientific, with a sacrifice-based twist.
Olivia Maurel
Olivia Maurel (born 1991) is a French-American anti-surrogacy activist born via traditional surrogacy in Kentucky, USA; spokesperson of the Casablanca Declaration and author of ¿Dónde estás, mamá?
Omladina
Omladina (Serbian and Czech for "youth") refers to the United Serbian Youth founded in 1866 and a Czech radical youth movement tried in Prague in 1893–1894.
Omnisexuality
Omnisexuality (omnisexualité) is a multisexual orientation defined by attraction to people of all genders, with gender playing a role in attraction, distinguishing it from gender-blind pansexuality; first recorded in 1959.
On-again, off-again relationship
On-again, off-again relationship (relationship cycling, churning): a romantic relationship in which the same partners break up and renew at least once. About two-thirds of adults experience one; cycling correlates with relational stress, depression, and anxiety.
OneTaste
OneTaste: San Francisco sexual-wellness company (2004) founded by Nicole Daedone and Robert Kandell around trademarked orgasmic meditation, a 15-minute clitoral stroking practice; leaders convicted of forced labor conspiracy in 2025.
Online shaming
Online shaming is public social policing of perceived transgressions via social media, also called cancel culture or call-out culture. Key facts: no accepted definition, viral pile-ons, documented job loss and depression, five ethical constraints, and platform regulation debates.
Only child
Only child: a person raised without siblings. Covers definitions and measurement, EU and UK prevalence, outcome research from Polit and Falbo onward, and China's one-child policy cohort.
Open defecation
Open defecation is defecating in fields, bushes, water, or other open spaces instead of using a toilet. 354 million people practised it in 2024, down from 1.3 billion in 2000; ending it is SDG target 6.2.
Open marriage
Open marriage: a married couple's mutual agreement permitting sexual, sometimes emotional, relationships outside the marriage; a form of consensual non-monogamy popularized by the O'Neills' 1972 book, distinct from infidelity, swinging, and polyamory.
Open relationship
Open relationship: a committed relationship in which partners agree one or both may have sex (sometimes romance) with others; a form of consensual non-monogamy alongside polyamory and swinging, distinguished from infidelity by consent and affecting about 4-5% of partnered adults.
Operation Raise the Colours
Operation Raise the Colours: 2025 UK campaign tying St George's Crosses and Union Jacks to lampposts, bridges and roundabouts, begun in Birmingham and east London, spread via social media, linked to far-right organisers and council removal disputes.
Opium den
An opium den was an establishment where opium was prepared and smoked, arising in eighteenth-century China and spreading to North America, Britain, and Southeast Asia by the mid-nineteenth century.
Opium of the people
Opium of the people: Karl Marx's phrase from his 1844 Introduction to the Critique of Hegel's Philosophy of Right (Die Religion ist das Opium des Volkes), describing religion as both consolation for and protest against real suffering.
Opposition to AI data centers
Opposition to AI data centers is the U.S. grassroots and political backlash against AI-serving facilities, over electricity bills, water use, noise, tax breaks, and few jobs, producing moratoria, bans, Gallup majorities, and state legislation.
Oppression
Oppression: the systematic, unjust constraint or reduction of a group through social forces. Covers Young's five faces, Frye's enclosing structures, structural operation, and 2021 ILO count of 49.6 million in modern slavery.
Oral sex
Oral sex, mouth-to-genital stimulation (fellatio, cunnilingus, anilingus), is practiced by over 85% of US sexually active adults. It transmits many STIs including gonorrhea, syphilis, and HPV (linked to 60-70% of oropharyngeal cancers), while HIV risk is much lower than from anal or vaginal sex.
Orelha case
Orelha case (Caso Orelha): 2026 Brazilian animal-cruelty investigation after the community dog Orelha of Praia Brava, Florianópolis, was beaten by teenagers on 4 January 2026, sparking national protests and the 'Justiça por Orelha' decree.
Orgasm (ργασμός)
Orgasm (Greek ὀργασμός) is the climax of sexual arousal, with intense pleasure and rhythmic pelvic muscle contractions. Key facts: no standard definition, Masters and Johnson's four-phase response cycle, and a 22–30 point orgasm gap between men and women.
Orgy
Orgy (Greek orgia): originally secret Dionysiac rites of ancient Greek and Roman religion; the word shifted to mean drunken revelry and, in modern usage, multi-partner group sex, now studied as socially organized group sex cultures.
Orphan
Orphan: a child under 18 who has lost one parent (single orphan) or both parents (double orphan). Covers UNICEF definitions, AIDS-related orphanhood, the history of orphanages, and research comparing institutional and family-based care.
Orphan Train
The Orphan Train Movement relocated roughly 150,000 to 250,000 poor New York children to rural families in the Midwest and West between 1854 and 1929, pioneering American foster care.
Orphanage
Orphanage, also called residential or institutional care, is a facility where children separated from parents live under paid staff. About 2 million children live in such care worldwide, most with living relatives; institutionalization harms development, driving deinstitutionalization toward kinship and foster care.
Outing
Outing is the non-consensual public disclosure of a person's sexual orientation or gender identity. Known from the 1990 OutWeek Malcolm Forbes controversy, outing raises journalism-ethics, legal, school, and digital-privacy issues distinct from voluntary coming out.
Outline of relationships
The outline of relationships, also called a topic outline of relationships, surveys the main types of human relationships, how they form and end, and the theories explaining them.
Oxfam
Oxfam, from the Oxford Committee for Famine Relief (founded 1942), is a global confederation of 20+ charitable affiliates fighting inequality, poverty, and injustice in over 70 countries, headquartered via its Secretariat in Nairobi.
Pacifism
Pacifism is a commitment to peace and opposition to war, ranging from absolute rejection of all violence to contingent anti-warism. Also called relative or conditional pacifism; rooted in Christian, Indian ahimsa, and other traditions; linked to conscientious objection law.