Slum in the context of "United Nations"

The United Nations uses three definitions for what constitutes a city, as not all cities in all jurisdictions are classified using the same criteria. Cities may be defined as the cities proper, their metropolitan regions, or the extent of their urban area. A complicating factor is that many large cities in the world have not only homeless or the unhoused, but also vast slum communities. This leads to official census data being less accurate in representing the actual number of residents in a given area.

The Regency era of British history is commonly understood as the years between c. 1795 and 1837, although the official regency for which it is named only spanned the years 1811 to 1820. King George III first suffered debilitating illness in the late 1780s, and relapsed into his final mental illness in 1810. By the Regency Act 1811, his eldest son George, Prince of Wales, was appointed Prince Regent to discharge royal functions. The Prince had been a major force in Society for decades. When George III died in 1820, the Prince Regent succeeded him as George IV. In terms of periodisation, the longer timespan is roughly the final third of the Georgian era (1714–1837), encompassing the last 25 years or so of George III's reign, including the official Regency, and the complete reigns of both George IV and his brother and successor William IV. It ends with the accession of Queen Victoria in June 1837 and is followed by the Victorian era (1837–1901).

Although the Regency era is remembered as a time of refinement and culture, that was the preserve of the wealthy few, especially those in the Prince Regent's own social circle. For the masses, poverty was rampant as urban population density rose due to industrial labour migration. City dwellers lived in increasingly larger slums, a state of affairs severely aggravated by the combined impact of war, economic collapse, mass unemployment, a bad harvest in 1816 (the "Year Without a Summer"), and an ongoing population boom. Political response to the crisis included the Corn Laws, the Peterloo Massacre, and the Representation of the People Act 1832. Led by William Wilberforce, there was increasing support for the abolitionist cause during the Regency era, culminating in passage of the Slave Trade Act 1807 and the Slavery Abolition Act 1833.

Nouakchott (/nwækˈʃɒt, nwɑː-/ nwa(h)k-SHOT) is the capital and largest city of Mauritania. Located in the southwestern part of the country, it is one of the largest cities in the Sahara. The city also serves as the administrative and economic center of Mauritania.

Once a mid-sized coastal village, Nouakchott was selected as the capital for the nascent nation of Mauritania, with construction beginning in 1958. It was originally designed to accommodate a population of 15,000, but experienced significant population growth in the 1970s when many Mauritanians fled their home villages due to drought and increasing desertification. Many of the newcomers settled in slum areas of the city that were poorly maintained and extremely overcrowded. By the mid-1980s, Nouakchott's population was estimated to be between 400,000 and 500,000.

Port-au-Prince (/ˌpɔːrt oʊ ˈprɪns/ PORT oh PRINSS; French: [pɔʁ o pʁɛ̃s] ; Haitian Creole: Pòtoprens, [pɔtopɣɛ̃s]) is the capital and most populous city of Haiti. The city's population was estimated at 1,200,000 in 2022 with the metropolitan area estimated at a population of 2,618,894. The metropolitan area is defined by the IHSI as including the communes of Port-au-Prince, Delmas, Cité Soleil, Tabarre, Carrefour, and Pétion-Ville.

The city of Port-au-Prince is on the Gulf of Gonâve: the bay on which the city lies, which acts as a natural harbor, has sustained economic activity since the civilizations of the Taíno. It was first incorporated under French colonial rule in 1749. The city's layout is similar to that of an amphitheater; commercial districts are near the water, while residential neighborhoods are located on the hills above. Its population is difficult to ascertain due to the rapid growth of slums in the hillsides above the city; however, recent estimates place the metropolitan area's population at around 3.7 million, nearly a third of the country's national population. The city was catastrophically affected by a massive earthquake in 2010, with large numbers of structures damaged or destroyed. Haiti's government estimated the death toll to be 230,000. Gang violence is extensive, and kidnappings, massacres, and gang rapes are common occurrences, often with the complicity of police officers and politicians.