City-state

A city-state is a political community centred on a single city that governs itself and, usually, a surrounding hinterland, without being part of a larger state. It is the oldest recurring form of self-government in recorded history: the Sumerian cities, the Greek poleis, the Phoenician ports, the Italian communes, the Swahili coast towns, the Hausa cities and the Maya centres were all, in different ways, city-states. Today only a handful of sovereign city-states remain (Singapore, Monaco and the Vatican City), but the form survives in sub-national guises (Hamburg, Bremen and Berlin are city-states within the German federation), in special administrative regions such as Hong Kong and Macau, and in contemporary proposals for charter cities, free cities and network states.

The distinguishing features are scale and proximity: a city-state's citizens live close to the centre of power, its economy is usually urban and commercial, and its political identity is attached to the city rather than to a larger nation or territory.

Political theory has repeatedly returned to the city as the natural unit of self-government. Aristotle described the polis as the community in which human beings can live well, small enough that citizens know one another and can take turns ruling and being ruled. Rousseau held that genuine popular sovereignty was possible only in small republics, and Montesquieu associated republican virtue with limited territory.

Comparative historians, notably the Copenhagen Polis Centre led by Mogens Herman Hansen, compared some thirty city-state cultures: regions where many city-states coexisted, shared a language and culture, traded and fought with one another, and often formed leagues. They argue that such systems tended to emerge where geography fragmented political control and where trade made cities rich enough to defend themselves.

Why did city-states largely disappear? Hendrik Spruyt's comparison of sovereign territorial states, city-leagues such as the Hanseatic League and the Italian city-states argues that the outcome was not inevitable: several forms of authority emerged from feudalism, and only later did sovereign territorial states prove more successful at organising domestic society and structuring external affairs. Military historians add the cost of gunpowder warfare and fortification, which favoured larger fiscal bases.

City-state governance features

• Athens. The best-documented ancient city-state, which developed direct democracy in the fifth and fourth centuries BCE. The Copenhagen Polis Centre's inventory describes 1,035 of the roughly 1,500 Greek poleis of the archaic and classical periods.
• Italian city-republics. From the late eleventh century, cities such as Pisa, Genoa, Milan and Florence created self-governing communes with elected consuls, later replaced in many cases by podestà or by signorial rule. Venice remained a republic until 1797.
• Hanseatic cities. Lübeck, Hamburg, Bremen and others combined local self-government with membership of a commercial league that negotiated with kings. Hamburg and Bremen remain city-states within Germany.
• Singapore. Separated from Malaysia and became independent on 9 August 1965. It is a sovereign city-state with a dominant-party parliamentary system, a highly capable civil service and one of the world's highest income levels; critics point to restrictions on press freedom, assembly and opposition.
• Free cities and international zones. The Free City of Danzig (1920–1939) under League of Nations protection, the Free State of Fiume and the Tangier International Zone show attempts to give contested port cities special status outside ordinary national sovereignty.
• Contemporary proposals. Charter cities, Próspera in Honduras, Telosa and network-state projects borrow the city-state's promise of small-scale institutional experimentation, usually without full sovereignty.

• Exclusive citizenship. Historic city-states typically excluded women, slaves, foreigners and the poor from citizenship. Athenian democracy depended on slave labour, and modern Singapore relies heavily on migrant workers with limited rights.
• Faction and civil strife. Italian and Greek city-states were notorious for violent factional conflict, exile of losers and coups, leading many to accept one-man rule.
• Vulnerability. Small size makes them dependent on alliances, trade routes and the goodwill of larger powers; many were absorbed or conquered.
• Elite capture. Commercial oligarchies often dominated, as in Venice's closed Great Council after 1297.
• Free-riding and externalities. Modern city-states can act as tax havens or regulatory havens that draw revenue and capital from larger neighbours.

City-states have been extraordinary laboratories of political invention: democracy, republican mixed constitutions, rotation in office and civic citizenship all developed in them. They were, however, repeatedly overtaken by larger territorial states, and only a few survive as sovereign units. Modern Singapore shows that a city-state can be prosperous and stable in a world of large states, though not necessarily democratic. Contemporary interest in charter cities and network states revives the city-state's core idea: that small, exit-friendly jurisdictions can experiment with institutions faster than nations.

• Mogens Herman Hansen (ed.), A Comparative Study of Thirty City-State Cultures (Royal Danish Academy of Sciences and Letters, 2000)
• Mogens Herman Hansen and Thomas Heine Nielsen (eds.), An Inventory of Archaic and Classical Poleis (Oxford University Press, 2004)
• Daniel Waley and Trevor Dean, The Italian City-Republics (4th ed., 2010)
• Hendrik Spruyt, The Sovereign State and Its Competitors (Princeton University Press, 1994)