used in the British sense, especially as cities annex formerly outlying areas. History The history of suburbia is part of the study of urban history, which focuses on the origins, growth, diverse typologies, culture, and politics of suburbs, as well as on the gendered and family-oriented nature of suburban space. Many people have assumed that early-20th-century suburbs were enclaves for middle-class whites, a concept that carries tremendous cultural influence yet is actually stereotypical. Some suburbs are based on a society of working-class and minority residents, many of whom want to own their own house. Meanwhile, other suburbs have instituted "explicitly racist" policies to deter people deemed as "other", a practice most common in the United States in contrast to other countries around the world. Mary Corbin Sies argues that it is necessary to examine how "suburb" is defined as well as the distinction made between cities and suburbs, geography, economic circumstances, and the interaction of numerous factors that move research beyond acceptance of stereotyping and its influence on scholarly assumptions. Early history The earliest appearance of suburbs coincided with the spread of the first urban settlements. Large walled towns tended to be the focus around which smaller villages grew up in a symbiotic relationship with the market town. The word suburbani was first employed by the Roman statesman Cicero in reference to the large villas and estates built by the wealthy patricians of Rome on the city's outskirts. Towards the end of the Eastern Han Dynasty, until 190 AD, when Dong Zhuo razed the city, the capital Luoyang was mainly occupied by the emperor and important officials; the city's people mostly lived in small cities right outside Luoyang, which were suburbs in all but name. As populations grew during the Early Modern Period in Europe, towns swelled with a steady influx of people from the countryside. In some places, nearby settlements were swallowed up as the main city expanded. The peripheral areas on the outskirts of the city were generally inhabited by the very poorest. Origins of the modern suburb Due to the rapid migration of the rural poor to the industrializing cities of England in the late 18th century, a trend in the opposite direction began to develop, whereby newly rich members of the middle classes began to purchase estates and villas on the outskirts of London. This trend accelerated through the 19th century, especially in cities like London