Key points
- Berry: cities are systems within systems of cities and their position depends on their connections, not only their size.
- He tested Christaller's central place theory and showed the regular hierarchy of commercial centres.
- He proposed functional urban areas and identified counterurbanization in 1976; Harvey criticised that he described patterns without explaining power.
Cities link and rank within an invisible system that urban geography learned to measure thanks to Brian J. L. Berry, the British-American geographer who in 1964 formulated the idea of cities as systems within systems of cities. A city receives goods, people and information all day and sends services and decisions to other places; on a traditional map we see separate dots, and Berry proposed looking at the connections between them. His question is what we discover when we study cities as parts of a system rather than as isolated units, and his answer, built with statistics, models and systematic comparison, is that territory is a structure of relations whose shape can be studied, compared and predicted.
Quantitative revolution and central places: from Christaller to Berry
Berry was a central figure of the quantitative revolution in geography in the 1950s and 1960s, which replaced regional description with the search for spatial laws through statistical methods. His starting point was Walter Christaller's central place theory, which in 1933 had explained the distribution of cities in southern Germany by their function of supplying goods and services to market areas of different reach; Berry tested it empirically in the American Midwest and in Geography of Market Centers and Retail Distribution (1967) showed how commercial centres, from the village store to the great metropolitan centre, are ordered in a regular hierarchy of sizes, functions and areas of influence.
Flows, hierarchies and market areas: the mechanism of the system
The mechanism is flows. A city exchanges goods and services with other places, receives population and information and takes part in relations of power, and those movements create connections of different intensity: some cities concentrate more functions and relations, others keep ties with nearby centres or with more extensive territories. Berry used statistical models to study those patterns, observing flows, comparing their distribution and identifying hierarchies and related areas. The city stops being a set of streets and buildings and becomes a node whose position depends on its connections; visible size explains only part, and the rest is explained by which connections it concentrates and which territories depend on them.
Functional areas, counterurbanization and long waves
His work went beyond static hierarchy. Berry studied the urban systems of India, Chile and the United States, proposed functional urban areas, regions defined by daily commuting rather than administrative limits, which statistical offices across the world now use; identified counterurbanization in 1976, the moment American population began growing faster in non-metropolitan areas than in big cities; and in Long-Wave Rhythms (1991) related the long cycles of the economy to waves of urban growth and infrastructure investment. His method, comparing urban systems with the same indicators, anticipated studies of global city networks.
Criticism from the critical turn and the empirical legacy
Criticism arrived with the critical turn of the 1970s. David Harvey, who had taken part in the quantitative revolution, abandoned it on the grounds that it described patterns without explaining the power that produced them, and Marxist and later postcolonial urban studies reproached Berry's models for their apparent neutrality and their origin in American experience. Berry responded by incorporating politics and history into his analyses, and his empirical legacy, hierarchies, functional areas, measured flows, remains the base on which critical theory argues.
Berry's lesson is that no city is understood alone. Its position in the system, what it receives, what it sends and on whom it depends, explains its growth, its specialisation and its vulnerability better than its administrative limits, which is why planning that looks only inside the municipality loses half of its object. Measuring connections, as Berry taught, is the first step toward governing a territory that works as a network even though it is administered in fragments.
Frequently asked questions
What does it mean that cities form a system according to Brian Berry?
That cities exchange goods, services, population, information and power through flows that create connections of different intensity, so that each city is a node whose position, growth and specialisation depend on its relations with the others and can be studied with statistics and models.
What criticism did Berry's quantitative approach receive?
David Harvey and critical urban studies reproached the models for describing hierarchies and patterns without explaining the power and economic relations that produce them, and for their origin in American experience; Berry incorporated politics and history, and his empirical legacy remains the base for debate.
