Cartographic School and Economic Theories of Crime

For NET purposes, fix two names to two roles. Andre-Michel Guerry was a French lawyer inside the justice ministry who used France's new national crime records, published from 1827 onward, to build the first cartographic school crime maps of a nation in his 1833 Essai sur la statistique morale de la France.

Adolphe Quetelet was a Belgian astronomer and mathematician who applied the same statistical instincts more broadly, arguing that crime rates show a stable regularity across years the way physical measurements do.

Both worked from official criminal justice statistics rather than case-by-case moral commentary, an outlook contemporaries called moral statistics. This is why the school is also named the geographic or statistical school of criminology, and why examiners treat it as an early scientific movement that predates Cesare Lombroso's positivist focus on the offender's body.

A common trap in objective questions is swapping the two names or their nationalities. Guerry is French and made the maps of France; Quetelet is Belgian and generalised the statistical claim into a theory of social regularity, including the concept of l'homme moyen, the average man.

Guerry mapped crimes against persons and crimes against property separately rather than as one total, and the results cut against the assumption that poverty and low education directly bred crime. Property crime clustered in wealthier, more literate northern departments, while violent crime against persons clustered in poorer southern departments. The memorisable takeaway is that a single national crime rate hides real patterns, and disaggregating by offence type and place can overturn an intuitive causal story.

Quetelet's specific, name-recall finding is the thermic law of crime: violent offences against persons rise in warmer months and warmer regions, while property offences rise in colder months and colder regions. Quetelet did not claim heat causes aggression directly; his explanation rested on seasonal social contact, since warm weather brings people outdoors into contact and friction, while cold weather drives people indoors and leaves homes and stores more predictably exposed to theft.

Quetelet's broader claim was that crime is a stable social product, not a string of unrelated individual choices, summed up in his idea of the constancy of crime. This reframing, shifting explanation away from the individual offender and toward society, is the direct conceptual ancestor of the structural theories that came after it, Bonger's economic theory included.

The cartographic school's core empirical claims have held up reasonably well: modern criminology confirms a real, if modest, seasonal pattern in recorded property crime, and Guerry's practice of mapping offence types separately is now standard in police crime-mapping and hotspot analysis.

The weakness NET most likely tests by name is the ecological fallacy: inferring facts about individuals from a pattern that holds only at the level of an aggregated group.

Guerry and Quetelet could show that a region had more property crime or more violent crime, but neither could explain why any one particular resident actually offended. A related limitation is that official statistics record only prosecuted crime, not crime that occurred, so the maps also reflect policing and reporting behaviour, a limitation modern criminology addresses through the dark figure of crime and victimisation surveys.

Even with these limits, the school proved crime could be studied as a measurable social pattern rather than only a moral failing, setting the stage for the structural theory Bonger built afterward.

Willem Bonger, a Dutch criminologist working within a Marxist framework, published Criminaliteit en Socialisme in 1905, translated into English in 1916 as Criminality and Economic Conditions. His central claim is that capitalism, organised around competition and private profit, systematically cultivates egoism, a self-centred orientation that weakens the social sentiment that would otherwise restrain people from harming others for personal gain. Crime, in his account, is what egoism looks like once it meets either desperate want or unchecked opportunity.

A detail worth memorising for objective questions: Bonger explicitly rejected the idea that crime is confined to the poor. He wrote at length on crimes of the well-to-do, treating fraud and commercial offending among the wealthy as the same egoistic pressure channelled through a different opportunity, which makes his theory a critique of capitalism as a whole rather than a theory of lower-class deviance alone.

Bonger also distinguished absolute poverty, deprivation against a fixed subsistence floor, from relative poverty, deprivation measured against what a person's own society has taught them to want. He treated relative poverty as the sharper driver of crime, a distinction that anticipated later strain and relative-deprivation theories and remains his most cited contribution even among scholars who reject his Marxist framing.