Criminalization is the process by which governments turn behaviors, statuses, or conditions into criminal offenses, and it reaches far beyond what most people picture when they think about “crime.” Scholars describe it as a social and political process shaped by demographic shifts, interest-group politics, globalization, and institutional momentum, not simply a rational response to harmful conduct. The consequences ripple outward from the person charged, affecting public health, housing, employment, and entire communities in ways that often undercut the stated goals of the laws themselves.
How Behaviors Become Crimes
The popular assumption is that the criminal law grows in response to genuinely dangerous conduct. Sometimes it does. But researchers who study criminalization as a phenomenon find that the expansion of criminal law is driven just as powerfully by symbolic politics, bureaucratic convenience, and the interests of organized groups seeking to use state power to advance their agendas. Classic scholarship in the field examines how demographic changes, material interests, and culture-war dynamics all feed into decisions about what gets labeled a crime, while newer work links criminalization to broader processes of globalization and institutional change.1Annual Review of Sociology. Explaining Criminalization: From Demography and Status Politics to Globalization and Modernization
One striking illustration of this dynamic is the sheer volume of offenses modern governments create. A study of lawmaking in England found that in a single year, 1997–98, the incoming government created 1,235 new criminal offenses. A subsequent government created 634 in its first year. The majority of these offenses carried the possibility of imprisonment, and a significant share, including many created through secondary legislation rather than full parliamentary debate, carried maximum sentences of five years or more.2Oxford Academic. ‘Frenzied Law Making’: Overcriminalization by Numbers – Section: What Do We Know about the Extent of the Criminal Law? The study also found that roughly 60 percent of the offenses created in that first burst were no longer in force just over a decade later, suggesting many were reactive or politically motivated rather than responses to enduring public safety needs.
This tendency toward what legal scholars call “overcriminalization” matters because every new offense expands the population of people who can be arrested, prosecuted, and burdened with a criminal record. When offenses are created quickly, sometimes through regulatory instruments rather than legislation, there is less public scrutiny of whether criminal penalties are the right tool for the problem at hand.
Criminalizing Poverty and Homelessness
Some of the starkest examples of criminalization involve conduct that is essentially unavoidable for people who are poor. Laws against sleeping in public, sitting on sidewalks, or panhandling turn the daily existence of unhoused people into a series of criminal or quasi-criminal encounters. Proponents of these “quality of life” ordinances often frame them as tough-love interventions meant to push people toward services. Research tells a different story.
A study of police enforcement patterns found that most homeless residents reported their lives became more challenging, more stressful, and less safe after the expansion of quality-of-life policing, not less so.3Urban Affairs Review. No Right to Rest: Police Enforcement Patterns and Quality of Life Consequences of the Criminalization of Homelessness Rather than connecting people with housing or treatment, the enforcement campaign worsened the conditions it claimed to address.
A separate analysis drawing on surveys and interviews with currently and recently homeless people found that punitive interactions with police, including move-along orders, citations, and the destruction of personal property, systematically limited access to services, housing, and jobs while damaging health and safety. The study described a pattern of “pervasive penality,” in which people rarely ended up formally arrested but experienced a constant churn of low-level punishment that pushed them from one neighborhood or jurisdiction to another without ever reducing the visible presence of homelessness.4Social Problems. Pervasive Penality: How the Criminalization of Poverty Perpetuates Homelessness Anti-homeless laws, in other words, do not solve the problem. They relocate it geographically while making it harder for the people affected to escape homelessness.
Drug Policy and the Case for Decriminalization
Drug criminalization is perhaps the area where the gap between the intended goal and the actual outcome has been most thoroughly documented. Punishing personal drug use and possession was supposed to deter consumption and reduce harm. Instead, decades of evidence suggest that criminal penalties have disproportionately burdened already marginalized communities, reduced opportunities for education and employment, and made it harder for people to seek treatment.5PubMed. Support, don’t punish: Drug decriminalization is harm reduction
Portugal’s experience provides the most cited natural experiment. In 2001, Portugal decriminalized the personal use, acquisition, and possession of all drugs, shifting its approach from criminal punishment to public health intervention. Contrary to widespread predictions that drug use would spike, the evidence showed reductions in problematic use, drug-related harms, and criminal-justice overcrowding.6The British Journal of Criminology. What Can We Learn From The Portuguese Decriminalization of Illicit Drugs?
The Portuguese story is not a simple triumph, though. A review of the policy’s first two decades found contradictions and ambiguities that have marked the approach since the beginning. Harm reduction measures were implemented modestly, and a 2008 Supreme Court ruling re-established drug use as a criminal matter when the quantity exceeded a ten-day personal supply, effectively narrowing the scope of decriminalization. The last decade saw an uptick in punitive sentences directed at drug users, complicating the narrative that Portugal fully abandoned a criminal framework.7PubMed Central. 20 years of Portuguese drug policy – developments, challenges and the quest for human rights The lesson is that decriminalization on paper requires sustained political commitment to actually redirect resources from punishment toward treatment and prevention. Without that follow-through, the old punitive reflex reasserts itself.
Public Health Consequences of Criminal Law
Criminal law intersects with public health in ways that can make health outcomes worse, sometimes dramatically so. Two areas illustrate this clearly: the criminalization of HIV exposure and the criminalization of substance use during pregnancy.
HIV Criminalization
As of one comprehensive review, nearly two-thirds of U.S. states had laws criminalizing potential HIV exposure. Twenty-four states required people aware of their HIV status to disclose it to sexual partners, and fourteen required disclosure to needle-sharing partners. Twenty-five states criminalized behaviors that pose a low or negligible risk of transmission.8PubMed Central. Prevalence and public health implications of state laws that criminalize potential HIV exposure in the United States Most of these laws were enacted before research demonstrated that antiretroviral therapy drastically reduces transmission risk, and the majority did not account for condom use, treatment, or pre-exposure prophylaxis.
The public health concern is that these laws can actually undermine prevention. Research on counseling relationships found that criminalization discouraged people living with HIV from being open about non-disclosure in clinical settings, making honest conversations about risk more difficult rather than less.9PubMed. The problem of “significant risk”: exploring the public health impact of criminalizing HIV non-disclosure If someone fears prosecution for admitting they have not disclosed their status, they are less likely to discuss it with a health provider who might help them navigate disclosure safely. The law, designed to protect public health, ends up creating a chilling effect on the very conversations that protect public health.
Substance Use During Pregnancy
A similar dynamic plays out with laws that treat prenatal substance use as a criminal act. In states that classify it as a crime, data show a roughly 45 percent increase in overdose deaths among pregnant women after implementation. Policies involving child welfare or law enforcement intervention were associated with no decrease in prenatal substance use, less use of prenatal care and addiction treatment, a 10 to 18 percent increase in babies born exposed to substances, and more children entering foster care.10PubMed Central. What’s Working (or Not) in State Policies for Substance Use During Pregnancy
The mechanism is straightforward. When pregnant women fear arrest or losing custody, they avoid medical care. They skip prenatal appointments. They do not seek addiction treatment. The result is worse outcomes for both the mother and the child, the exact opposite of what the laws purport to achieve. This is one of the clearest cases where criminalization produces measurably worse results than the public health approaches it displaces.
Immigration and the “Crimmigration” System
Immigration enforcement in the United States has increasingly merged with the criminal justice system, a convergence that researchers call “crimmigration.” Today, most deportations are achieved through this hybrid system, which uses criminal charges, criminal records, and criminal justice infrastructure to process and remove noncitizens.11Sociology of Race and Ethnicity. Racializing Crimmigration
This blending has several practical consequences. Minor criminal charges that would result in probation or dismissal for a citizen can trigger mandatory detention and deportation for a noncitizen. A decades-old misdemeanor conviction can surface during a routine traffic stop and lead to removal proceedings. The system creates a two-tiered justice framework in which the same offense carries vastly different consequences depending on citizenship status, and it layers the collateral effects of a criminal record on top of the already precarious legal position of immigrants.
Who Gets Criminalized
Laws are written in general terms, but enforcement is not distributed evenly. Research consistently shows that extralegal factors, characteristics unrelated to the offense itself, significantly influence who gets arrested, charged, and convicted. A study of police booking decisions for minor offenses found that Native Americans, Black people, older individuals, and those with prior records had higher odds of being formally booked, even after accounting for the nature of the offense.12PubMed Central. Impact of Extralegal and Community Factors on Police Officers’ Decision to Book Arrests for Minor Offenses
This disparity compounds over time. A person booked for a minor offense acquires a criminal record, which makes them more likely to be booked again in future encounters. Each contact with the system increases the weight of “prior record” in the next interaction, creating a feedback loop. Communities that are policed more heavily generate more arrests, which generates more criminal records, which generates more arrests. The result is that criminalization concentrates its effects in specific neighborhoods and among specific racial and ethnic groups, regardless of whether the underlying behavior is more common there.
A review of the evidence on criminalization and mental health found that all forms of criminalization, from policing to incarceration, negatively affected mental health outcomes including depression, anxiety, and suicidality. The evidence was suggestive of a disproportionate impact on Black communities.13PubMed Central. Race, criminalization and urban mental health in the United States This is not just about the stress of being arrested or jailed. Living in a heavily policed environment, witnessing stops and searches, and absorbing the ambient threat of potential contact with law enforcement all contribute to chronic stress that degrades mental health at the community level.
The Long Tail of a Criminal Record
Even after a sentence is served, a criminal record continues to shape a person’s life. Researchers describe these downstream effects as “collateral consequences,” and they touch nearly every domain that matters for rebuilding stability. Criminal convictions limit access to the kinds of employment and social services that disadvantaged people most frequently rely on, regardless of the severity of the original offense.14PubMed Central. The Effects of Collateral Consequences of Criminal Involvement on Employment, Use of Temporary Assistance for Needy Families, and Health
The barriers extend into education and professional licensing. Research examining how institutions handle criminal records found that application forms and legal documents routinely require disclosure of criminal history, and this information is used to exclude formerly incarcerated people from higher education programs and professional registration, obstructing their reintegration into the workforce.15International Journal of Research in Business and Social Science (2147- 4478). Caught in the spider’s web: The collateral consequences of the criminal record on higher education, professional registration, and employment opportunities
The irony is thick. Criminalization is supposed to deter harmful behavior and protect public safety. But when a criminal record makes it harder to get a job, enroll in school, access public housing, or receive government assistance, the person’s options narrow in ways that can push them toward the very conduct the system was trying to prevent. The record becomes a self-fulfilling prophecy, locking people into marginality and cycling them back through the system.
Where the Money Goes
Criminalization is not just a legal and social process; it is a fiscal one. In the United States, cities have been increasing the share of their budgets devoted to policing while decreasing the share spent on social services. A growing body of research questions whether this allocation actually reduces crime or simply shifts costs. Education spending, for example, has been shown to durably reduce crime with fewer negative side effects than policing, though the benefits take longer to materialize. Evidence that housing and employment spending can suppress crime is promising but still emerging.16Annual Review of Criminology. Local Government Spending: Policing Versus Social Services
This raises an uncomfortable question: does spending more on police and less on social infrastructure reduce crime in the short term only to increase it in the long term? If enforcement-heavy budgets come at the expense of the programs that address the root conditions behind crime, such as poor educational access, unstable housing, and lack of employment, the net effect over a decade or two could be negative. The political calculus, though, favors the visible, immediate response. A new policing initiative is easy to announce. The crime-reduction effects of a school funding increase might not show up for a generation.
Alternatives That Redirect Rather Than Punish
If criminalization often fails to achieve its stated goals and sometimes makes things worse, what works instead? One well-studied alternative is restorative justice conferencing, a process in which offenders and victims meet face to face to discuss the harm caused and agree on steps to repair it. A systematic review of ten randomized trials found that this approach led to significantly less reoffending compared to standard criminal justice processing alone. The effect was larger for violent crimes than for property crimes.17Campbell Systematic Reviews: Better Evidence for a Better World. Restorative Justice Conferencing (RJC) Using Face-to-Face Meetings of Offenders and Victims: Effects on Offender Recidivism and Victim Satisfaction
Restorative justice is not appropriate for every situation, and it requires the willing participation of the victim. But the finding that it outperforms conventional prosecution on the metric that matters most, whether the person offends again, is worth sitting with. It suggests that the adversarial, punishment-centered approach is not just morally contested but practically inferior in at least some categories of crime.
Drug decriminalization, as discussed earlier with Portugal, represents another alternative: removing criminal penalties for personal use while maintaining them for trafficking, and redirecting resources toward health services. The early Portuguese results were encouraging, but the subsequent drift back toward punitive enforcement shows how fragile these reforms can be without institutional and political reinforcement.
When Criminalization Might Still Be the Right Tool
None of this means that criminalization is always the wrong response. Violent offenses, fraud, exploitation, and other conduct that directly and seriously harms others are cases where criminal penalties serve a clear purpose: incapacitation of dangerous individuals, restitution for victims, and a societal signal that certain behavior will not be tolerated. The critique is not that criminal law should not exist but that it has expanded well beyond its useful range.
The question worth asking of any proposed criminalization is whether the criminal penalty actually reduces the behavior in question, or whether it just punishes people for conditions they cannot easily change. When the target is addiction, poverty, homelessness, or a health status like HIV, the evidence overwhelmingly suggests that criminal penalties make things worse. When the target is predatory conduct with identifiable victims, the case for criminal law is much stronger, though even there, the specific design of the response matters enormously for whether outcomes improve or simply feel satisfying.
Distinguishing between these cases requires a kind of policy discipline that legislative bodies have not always shown. The tendency documented in overcriminalization research, where hundreds of new offenses are created in a single legislative session, many of them forgotten within a decade, suggests that the decision to criminalize is often made quickly and without serious consideration of whether criminal penalties are the best available tool. Building in requirements for evidence review, sunset clauses, or independent assessment before new offenses are enacted would not eliminate bad laws, but it would slow the machinery enough to let better questions be asked before the law is set in motion.