Definitions matter - and precision matters more
The term "modern slavery" is commonly used to describe two main categories: forced labour and forced marriage. "Trafficking in persons" is defined more specifically under the Palermo Protocol of the United Nations as the recruitment, transport, transfer, harbouring, or receipt of persons through coercion, deception, or abuse of vulnerability for the purpose of exploitation.
These distinctions are not academic. They affect how data is collected, how solutions are designed, and how resources are allocated. Not every case of child labour is trafficking. Not every trafficking case involves cross-border movement. Conflating these categories produces statistics that are harder to act on.
Key terms used on this page
Modern slavery (ILO definition): An umbrella term covering forced labour and forced marriage. The ILO estimates 50 million people were in modern slavery in 2021 - 28 million in forced labour and 22 million in forced marriage.
Forced labour: Work performed under threat or coercion, covering privately-imposed forced labour (including trafficking for labour and sexual exploitation) and state-imposed forced labour. The ILO estimates 27.6 million people in forced labour in 2021.
Trafficking in persons: A specific crime under the Palermo Protocol involving recruitment and movement of persons through coercion for exploitation. All trafficking involves forced labour or sexual exploitation; not all forced labour involves trafficking.
Child trafficking: One form within the broader trafficking category. Approximately 3.3 million children are in forced labour - 12% of the total. More than half are in commercial sexual exploitation.
What the data actually says
The most recent comprehensive estimates come from the ILO/Walk Free/IOM Global Estimates of Modern Slavery (2022 report, based on 2021 data) and the ILO's Profits and Poverty report (March 2024).
The $236 billion figure deserves unpacking because it reveals the structure of the problem:
Source: ILO, Profits and Poverty: The Economics of Forced Labour, March 2024
The profit-per-victim figure for forced commercial sexual exploitation is $27,252 per year - compared to $3,687 for other forms of forced labour exploitation. This disparity explains why sexual exploitation accounts for 73% of total illegal profits despite representing only 27% of victims. The economics are extremely unfavorable for intervention when measured purely by perpetrator returns.
These illegal profits represent wages that rightfully belong to workers but remain in the hands of their exploiters. The ILO's analysis makes clear this is primarily a labour economics problem, not simply a criminal justice one.
Why this crime persists - the economic logic
Like any illicit market, trafficking grows when the economics favor perpetrators. The core conditions are straightforward:
Expected profit exceeds expected punishment. When detection probability is low, prosecution capacity is weak, and victim protection is absent, the risk-adjusted return on exploitation is high. This is not primarily a question of awareness or moral failure. It is a question of incentive structures.
The ILO data illustrates this clearly. Illegal profits from forced labour have risen 37% in a decade. This is not despite increased global awareness of trafficking - it is concurrent with it. Awareness campaigns have not materially changed the underlying economics.
What changes the economics is making the crime less profitable and more risky. That requires three things working together: reducing victim vulnerability (so fewer people can be exploited), increasing prosecution rates (so expected punishment rises), and providing victim protection strong enough that survivors can participate in legal proceedings without fear of retaliation or deportation.
The key insight from research is that these three elements reinforce each other. Victims who receive shelter, legal support, and protection are significantly more likely to participate in legal proceedings. More prosecutions increase deterrence. More deterrence raises the expected cost of exploitation. Higher expected costs reduce the profit margin and make trafficking a less attractive economic activity at the margin.
Conversely, when victim protection is absent, the prosecution chain breaks at its weakest link. Without survivors willing and able to testify, conviction rates fall. Without convictions, deterrence remains low. Without deterrence, exploitation continues to be commercially rational.
What the evidence suggests works
The United Nations framework for combating trafficking is built around three interconnected pillars. The US Department of State's annual Trafficking in Persons report (which evaluates 188 countries) and research by anti-trafficking institutions consistently find that effective responses engage all three simultaneously.
Protection
Victim assistance: shelter, medical care, psychosocial support, legal aid, access to justice, vocational training, reintegration. This is the entry point that enables prosecution. Without protection, victims cannot safely participate in legal proceedings. This is where UNVTF funding goes.
Prosecution
Law enforcement, judicial capacity, and criminal justice frameworks. Prosecution rates remain extremely low globally relative to estimated prevalence. The State Department's 2024 TIP Report documents that strengthening victim participation in proceedings is critical to improving conviction rates.
Prevention
Structural risk reduction: addressing vulnerability factors including poverty, lack of legal status, labour market conditions, and absence of social protection. The ILO's 2024 report stresses that law enforcement alone cannot end forced labour; systemic structural change is required.
Why institutional support rather than rescue operations
Research on awareness campaigns in this field is sobering. A 2024 DHS-commissioned study found that short educational awareness videos can increase awareness in the short term, but that more comprehensive, structural programs are needed to produce sustained outcomes. Awareness does not translate to prosecution. Awareness does not reach victims. Awareness does not change the economics.
It funds front-line civil society organizations that provide the protection infrastructure enabling the prosecution chain to function. That is a narrower mandate than many donors prefer - and it is the right one.
Primary references
All statistics on this page are sourced from primary institutional reports. Sources are reviewed and updated annually. No statistics are extrapolated or estimated by ExValu.
ILO Global Estimates of Modern Slavery (2022)
50 million in modern slavery figure; 27.6 million in forced labour; 22 million in forced marriage; 3.3 million children. Co-produced with Walk Free and IOM.
ilo.orgILO: Profits and Poverty - The Economics of Forced Labour (2024)
$236 billion annual illegal profits; $10,000 per victim; 37% rise over decade; sectoral and regional breakdown.
ilo.orgUNODC: UNVTF About page (current)
Fund mandate, governance, reach statistics (100,000+ victims, 162+ projects, 60+ countries).
unodc.orgUS State Department: Trafficking in Persons Report (2024)
3P framework evaluation; 188-country assessment; prosecution and victim participation evidence.
state.govDHS Center for Countering Human Trafficking: FY2024 Annual Report
Victim-centred approach evidence; awareness campaign effectiveness data; 4P framework outcomes.
dhs.govUN Palermo Protocol (2000)
Legal definition of trafficking in persons used throughout this page.
unodc.orgExValu's commitment to UNVTF
This page provides the evidence basis for ExValu's decision to donate a fixed percentage of net revenues to the UN Voluntary Trust Fund for Victims of Trafficking in Persons. Annual donation amounts are published transparently.
See ExValu's giving commitment and annual donation record →
