The Danish penal system was transformed after the Second World War by an unresolved question: how should a democratic country punish thousands of people accused of helping the German occupying power, without creating a permanent class of outcasts after liberation?
When Denmark was liberated on 5 May 1945, the demand for justice was immediate. The legal purge (retsopgøret) targeted Danes who had supported or assisted the German occupation authorities between 1940 and 1945. According to Danmarkshistorien, more than 30,000 people were interned, around 13,000 were convicted, and 46 were executed. The reckoning was severe by Danish standards, but its longer-term legacy was not only punishment. It also pushed Denmark towards a more modern view of imprisonment, probation and resocialisation.
The legal purge began with punishment, not reintegration
The first months after liberation were marked by anger and political instability. The Criminal Code Supplement of 1 June 1945 (straffelovstillægget) introduced penalties for acts committed during the occupation that had supported German interests or harmed Denmark. It also reintroduced the death penalty for the most serious offences, even though capital punishment had been abolished in ordinary Danish criminal law in 1933.
The law reflected the mood of the time. It imposed harsh minimum sentences, loss of civil rights and special prison regimes for convicted collaborators. The purpose was to punish those labelled as traitors (landssvigere), not to prepare them for a return to society.
This was a clear break with the reformist ideas that had influenced Danish criminal law before the war. The 1933 Penal Code had already opened space for more individualised treatment of prisoners. In 1945, however, the educational and rehabilitative purpose of punishment was deliberately pushed aside. The political priority was to restore justice, public order and trust after occupation.
Why the Danish penal system changed after 1945
The shift began quickly. By the autumn of 1945, lawyers, criminologists and politicians started warning that punishment alone could create a new democratic risk.
The central concern was practical as much as moral. Most convicted collaborators would eventually leave prison. If they returned to society without work, support or rights, they could become permanently alienated from democratic life. Several reform-minded voices argued that Denmark should avoid creating a “pariah caste” of former offenders and their families.
Criminologist Karl O. Christiansen was among the early critics of a purely punitive approach. In August 1945, he warned that convicted collaborators could become more bitter and extreme if they were released into exclusion. His argument was not that the crimes should be ignored. It was that resocialisation was necessary to protect society after the sentence had been served.
A similar argument came from Mogens Fog, Minister for Special Affairs (minister for særlige anliggender) and a member of the Danish Communist Party (Danmarks Kommunistiske Parti). In September 1945, he argued that “it is not enough to punish”. For Fog, the point was to turn former offenders into responsible citizens again, because a democratic society could not benefit from keeping thousands of people permanently outside its institutions.
A social problem as well as a political one
The debate also changed because many post-war reformers began to interpret collaboration as a social problem, not only as a political betrayal. Some believed that many convicted collaborators had been socially vulnerable, poorly educated or only superficially attached to Nazism.
This view was controversial. It did not apply to those responsible for violence, denunciations, torture or direct participation in German repression. But it shaped how officials thought about the broader group of convicted collaborators.
Fog divided the convicted into different categories. A small group was seen as violent and beyond meaningful reintegration. Another group was considered socially or psychologically vulnerable and in need of treatment. A larger group was viewed as people who had been shaped by poor conditions and could be helped back into society.
The theologian Hal Koch also criticised the legal purge for placing much of the burden on weaker groups, including so-called “German girls” (tyskerpiger) and lower-ranking collaborators, while many political and economic elites avoided equivalent scrutiny. This critique connected the legal purge to a wider post-war debate about democracy, responsibility and social cohesion.
Work became the route back into society
Work became one of the main tools for reintegration. Danish authorities looked partly to Sweden’s treatment of ordinary prisoners and partly to Norway’s handling of convicted collaborators, where labour-market reintegration played an important role.
In Denmark, the labour shortage after the war made this approach more politically realistic. Agriculture and employers’ organisations needed workers. Former prisoners, if supervised and gradually released, could help meet that demand.
Minister of Justice Aage Elmquist (justitsminister) expressed this logic clearly in May 1946. In a statement translated from Danish, he said: “We must not turn them into a pariah caste. We do not need to embrace them or take them in and show them warmth, or regard them as citizens just as good as others, but we must not exclude them from work. We must all do our part so that they can be readmitted into society as useful citizens.”
The quote shows the limits of post-war reconciliation. Former collaborators were not treated as fully equal in moral terms. Yet the state increasingly accepted that they had to be brought back into ordinary life, not only for their sake, but for the stability of Danish democracy.
Probation marked a new role for the state
One of the most important institutional changes came in 1946, when Denmark established a state framework for supervising and helping conditionally released prisoners. This marked a new understanding of the state’s responsibility after imprisonment.
The legal purge had initially removed the possibility of early release for many convicted collaborators. But in 1946, Parliament revised the Criminal Code Supplement, softened some penalties and opened the way for probation and conditional release. Over time, the Ministry of Justice also developed a practice of pardons.
This was a turning point. The state was no longer only punishing offenders inside prison. It was also taking responsibility for their controlled return to society. The principle later became central to modern Danish criminal justice: imprisonment should not be separated from the question of what happens after release.
The Nordic context mattered
The Danish debate was not isolated. Across Europe, governments had to decide how to deal with those accused of helping wartime enemies. In many countries, violence and informal revenge came before courts and administrative systems could be restored.
In Scandinavia, Denmark and Norway faced the most direct post-war legal reckoning because both had been occupied by Nazi Germany. Sweden had remained neutral, while Finland had followed a different wartime path. Denmark and Norway therefore became important Nordic cases in the wider European problem of post-war justice.
The comparison with Norway was especially relevant. Norway’s treason trials were among the most extensive in Europe, and the reintroduction of the death penalty also challenged pre-war legal principles. Both countries had to balance punishment, legality and reconciliation after occupation.
For Denmark, the result was a paradox. A highly punitive legal purge helped accelerate ideas that later made the penal system less purely punitive. The treatment of collaborators forced politicians and officials to ask whether a democratic state could afford to give up on reintegration.
A harsh reckoning with a reformist legacy
The Danish legal purge remains controversial. It relied on retroactive laws, reintroduced capital punishment and often struck lower-status groups harder than those with greater political or economic responsibility. It was shaped by anger, fear of revenge outside the courts and the need to restore public confidence after occupation.
Yet its institutional legacy was more complex. By 1946 and 1947, the debate had moved from revenge to management of release, employment and social reintegration. The convicted were not forgiven, and they were not always treated as equal citizens. But Danish authorities increasingly concluded that exclusion could become a political danger.
In that sense, the post-war reckoning helped modernise the Danish penal system. It strengthened the idea that punishment must be linked to life after prison. It also made resocialisation a marker of Denmark’s emerging post-war democracy: not as an act of sympathy for collaborators, but as a strategy to protect social cohesion, legality and democratic stability.
