Society and history

Bullwhip effect

The bullwhip effect, also called the Forrester effect, is the amplification of demand variability as orders move up a supply chain, from retailers to manufacturers.

Bullying is repeated aggressive behavior among youth involving a power imbalance, in person or online (cyberbullying). US school prevalence about 19%, with meta-analyses showing school anti-bullying programs reduce perpetration and victimization.

Buluggin ibn Muhammad

Buluggin ibn Muhammad (بلكين بن محمد) was the fourth emir of the Hammadid dynasty in the Central Maghreb, reigning from 1055 to 1062. He took the throne by killing his cousin Muhsin ibn Qaid.

Buluggin ibn Ziri

Buluggin ibn Ziri (بلكين بن زيري) was a Sanhaja Berber chief who ruled Ifriqiya and the Maghreb as the Fatimid caliph's viceroy from 972 until his death in 984.

Bulugh al-Maram

Bulugh al-Maram min Adillat al-Ahkam (بلوغ المرام), translated as Achievement of the Goal, is a concise Sunni hadith collection on Islamic law compiled by Ibn Hajar al-Asqalani in 1425, widely memorized and used across the madhhabs.

Bulungur school

The Bulungur school, or Bulung'ur dostonchilik maktabi, is a regional school of Uzbek epic storytelling centered in Bulungur district, Samarkand region, Uzbekistan, known for heroic dastans.

Bum Farto

Bum Farto (Joseph Anthony Farto, 1919–disappeared 1976) was Key West, Florida's fire chief, convicted in Operation Conch of selling cocaine and marijuana, who vanished before sentencing; his fate inspired "Where Is Bum Farto?" t-shirts and a 2022 musical.

Bumble

Bumble is a dating app founded in 2014 by Whitney Wolfe Herd, known for its women-message-first rule, removed in August 2026; parent Bumble Inc. also owns Badoo and BFF.

Bumin Qaghan

Bumin Qaghan, known in Chinese sources as Tumen, was the founder and first ruler of the Göktürk Khaganate, which he established in 552 by overthrowing the Rouran Khaganate.

Bumiputera (Malaysia)

Bumiputera is Malaysia's category for Malays, Orang Asli, and Sabah and Sarawak natives, about 69.4% of the 2020 population, protected under Article 153 and favored by affirmative action since the 1971 New Economic Policy.

Bumpy Johnson

Bumpy Johnson (Ellsworth Raymond Johnson, 1905-1968), Harlem crime boss and "Godfather of Harlem" subject, enforcer for Stephanie St. Clair, Dutch Schultz rival, Genovese ally, Alcatraz inmate, mentor of Frank Lucas.

Sep 24, 2026

Bun'ei Campaign

The Bun'ei Campaign (文永の役) was the first Mongol invasion of Japan: in 1274 a Yuan-Goryeo fleet of about 900 ships landed at Hakata Bay, Kyushu, and withdrew after one day.

Sep 24, 2026

Bundahishn

The Bundahishn (بندهشن) is a Middle Persian Zoroastrian encyclopedic work on cosmogony, cosmology, geography, and legend, given its final redaction in the 9th century CE.

Oct 10, 2026

Bundar

Bundar (بندar), full name Muhammad ibn Bashshar al-Abdi, was a ninth-century Basran hadith memorizer who narrated for sixty-seven years and whose material reaches the Sahih collections of al-Bukhari and Muslim.

Bundela dynasty

The Bundela dynasty (बुंदेला वंश) was a Rajput ruling lineage of Bundelkhand in central India, chiefly ruling from Orchha, founded in 1531, and reaching its peak under Bir Singh Deo.

Bundelkhand Agency

The Bundelkhand Agency was a British political agency administering the native states of Bundelkhand in central India, one of six agencies of the Central India Agency.

Bundesgesetzblatt (Germany)

Bundesgesetzblatt (BGBl.), Germany's federal law gazette: promulgates statutes and statutory instruments in Part I and treaties in Part II since 23 May 1949; edited by the Federal Ministry of Justice, electronic-only on recht.bund.de since 1 January 2023.

Bundestag

The Bundestag (German: Deutscher Bundestag) is the federal parliament of the Federal Republic of Germany. Alongside the Bundesrat, it has formed the German parliamentary system since 1949.

Bundeswehr

Bundeswehr (German "Federal Defence") is Germany's armed forces, established November 1955 as West Germany's contribution to NATO; now four services, refocused on national and collective defense after the 2022 Zeitenwende with a €100 billion fund.

Bundism

Bundism, the ideology of the General Jewish Labor Bund (founded Vilna 1897), a socialist, Yiddishist, anti-Zionist Jewish movement advocating diaspora national cultural autonomy, dominant in interwar Poland, revived internationally in 2023.

Bundling (tradition)

Bundling, a courtship custom in Europe and colonial North America: courting couples shared a bed fully clothed, often separated by a board or bolster, to test compatibility before marriage; survives among Amish.

Bundu

Bundu, also spelled Boundou or Bondu, was a precolonial Islamic state in eastern Senegal founded by the cleric Malik Sy, ruled by one dynasty from 1698 to 1905.

Bundu dia Kongo

Bundu dia Kongo is a politico-religious movement founded by Ne Muanda Nsemi and based in Kongo Central, DR Congo, that seeks to restore the pre-colonial Kingdom of Kongo.