Displaced persons in international law fall into several distinct legal categories, and the protections a person can claim depend on which category fits their situation. The three that matter most are refugees, who have crossed an international border and meet a specific definition; internally displaced persons, who have been forced from their homes but remain in their own country; and stateless persons, who hold no nationality at all. Asylum seekers sit between these, waiting for a decision on a claim. As of mid-2025, roughly 117.3 million people worldwide were forcibly displaced.1UNHCR. Mid-Year Trends
Who Counts as a Refugee
The 1951 Convention Relating to the Status of Refugees is the foundation of international refugee law. Under Article 1, a refugee is someone outside their country of nationality who cannot return because of a well-founded fear of persecution based on race, religion, nationality, membership in a particular social group, or political opinion. A person without any nationality qualifies if they are outside the country where they previously lived and cannot return for the same reasons.2OHCHR. Convention Relating to the Status of Refugees
Two elements do most of the work. The person must be outside their home country: someone fleeing violence who has not crossed an international border is not a refugee under this framework, regardless of how dire the situation. And the fear of persecution must be tied to one of the five listed grounds. Fleeing generalized poverty or a natural disaster, without more, does not meet the Convention’s definition.
The original 1951 Convention only covered people displaced by events before January 1, 1951, and countries could restrict it to events in Europe. The 1967 Protocol removed both limits, giving the Convention universal reach.3UNHCR. Convention and Protocol Relating to the Status of Refugees
What Refugees Are Entitled To
The Convention does more than define who qualifies. It lays out a set of rights host countries must provide:
- Access to elementary education on the same terms as citizens, and access to higher education at least as favorable as that given to other foreign nationals.2OHCHR. Convention Relating to the Status of Refugees
- Favorable treatment regarding wage-earning work for refugees lawfully staying in the country, with restrictions on foreign workers easing further after three years of residence.
- Housing treatment at least as favorable as that given to other foreign nationals, where housing is regulated by public authorities.
- Identity papers for any refugee in the territory who lacks a valid travel document, plus travel documents allowing travel outside the host country.
These are minimum obligations. Many countries grant broader rights through their own legislation, but the Convention sets a floor that matters for people who arrive with nothing.
Non-Refoulement: The Rule That Binds Everyone
Article 33 of the 1951 Convention prohibits countries from returning a refugee to any territory where their life or freedom would be threatened because of race, religion, nationality, social group membership, or political opinion.2OHCHR. Convention Relating to the Status of Refugees
This rule reaches further than the Convention. Non-refoulement is now considered a norm of customary international law, meaning it binds every country regardless of whether it has signed the 1951 Convention or any other refugee treaty.4UNHCR. Access to Territory and Non-Refoulement A state cannot deport someone to a place where they face persecution and then claim it never agreed to the rule.
Asylum Seekers
An asylum seeker is someone who has left their country, says they need international protection, and is waiting for a decision on that claim. Every refugee was once an asylum seeker. The difference is timing: a refugee’s claim has been recognized, while an asylum seeker’s has not yet been evaluated.
During the determination process, asylum seekers are protected by non-refoulement. They cannot be sent back to the country they fled while their claim is pending. Procedures vary widely between countries. Some process applications within weeks; others take years. Backlogs leave many applicants in legal limbo, unable to plan their lives with certainty.
Internally Displaced Persons
Internally displaced persons (IDPs) are people forced from their homes who have not crossed an international border. Because they remain within their own country, they stay under the authority of their own government. No international treaty grants them a separate legal status the way the 1951 Convention does for refugees.
The closest thing to a framework is the 1998 Guiding Principles on Internal Displacement, developed under the auspices of the United Nations. These principles consolidate existing international human rights and humanitarian law as it applies to people displaced within their own borders, covering all phases from protection against arbitrary displacement to the right to return or resettle.5OHCHR. International Standards The Guiding Principles are influential but not legally binding.
This is where the system’s weakness shows most sharply. With roughly 67.8 million IDPs worldwide as of mid-2025, they are the largest group of displaced persons on earth, yet they have the weakest formal legal protections.1UNHCR. Mid-Year Trends When the government responsible for protecting them is also the one causing the displacement, the gap becomes a crisis.
Africa took a significant step to close it. The 2009 Kampala Convention, which entered into force in December 2012, is the first legally binding regional treaty specifically addressing internal displacement.6African Union. African Union Convention for the Protection and Assistance of Internally Displaced Persons in Africa (Kampala Convention) It creates enforceable obligations for African Union member states to prevent displacement, protect IDPs, and provide durable solutions. No comparable binding treaty exists in any other region.
Stateless Persons
Statelessness is a related but distinct form of vulnerability. The 1954 Convention Relating to the Status of Stateless Persons defines a stateless person as someone who is not considered a national by any country under its laws.7OHCHR. Convention Relating to the Status of Stateless Persons Statelessness can result from gaps between nationality laws, state succession, arbitrary deprivation of nationality, or discriminatory laws that strip citizenship from particular ethnic or religious groups.
Stateless people are not necessarily displaced. Many have never left the country where they were born. But statelessness makes people acutely vulnerable to displacement because without citizenship they often cannot access basic services, own property, travel legally, or seek protection from any government. When stateless persons are also displaced, their situation compounds: they carry the burdens of displacement without even a nominal home country to advocate for them. UNHCR is specifically mandated to identify, prevent, and reduce statelessness alongside its work with refugees.8UNHCR. UNHCR’s Mandate for Refugees and Stateless Persons, and Its Role in IDP Situations
Where Regional Law Goes Further
The five persecution grounds in the 1951 Convention leave real gaps. Someone fleeing a civil war or widespread violence may not face persecution for who they are or what they believe, yet clearly needs protection. Two regional instruments broadened the definition.
The 1969 OAU Convention
The Organization of African Unity kept the 1951 definition but added a second category. Under Article I, a person also qualifies as a refugee if forced to leave because of external aggression, occupation, foreign domination, or events seriously disturbing public order.9African Legal Information Institute. OAU Convention Governing the Specific Aspects of Refugee Problems in Africa
The 1984 Cartagena Declaration
Latin American countries took a similar approach. The Cartagena Declaration recommended that the region’s refugee definition include people who fled because their lives, safety, or freedom were threatened by generalized violence, foreign aggression, internal conflicts, massive human rights violations, or other circumstances seriously disturbing public order.10Organization of American States. Cartagena Declaration on Refugees Technically non-binding, it has been widely incorporated into domestic law across Latin America.
Climate Displacement
The term “climate refugee” has no legal standing. People displaced by rising seas, prolonged droughts, or extreme weather events do not automatically qualify as refugees under the 1951 Convention because environmental degradation is not one of the five recognized grounds for persecution.
Climate-displaced people are not entirely without protection. If an already-marginalized group is specifically denied access to shrinking resources like food or water because of who they are, members of that group could potentially meet the Convention’s persecution standard. Non-refoulement may also prevent countries from returning people to places where climate impacts have made conditions life-threatening. These are narrow, case-by-case arguments rather than systematic protections. A few countries have created domestic visa categories or temporary residence permits for people displaced by environmental disasters, but dedicated climate migration pathways remain rare.
How Displacement Is Meant to End
International law treats displacement as a condition to be resolved. UNHCR recognizes three traditional long-term solutions:
- Voluntary repatriation, where refugees return home once conditions improve. UNHCR supports this through assessment visits, legal assistance, and family reunification programs.11UNHCR. Solutions
- Local integration, where refugees settle permanently in the country that granted asylum and eventually gain rights comparable to citizens.
- Resettlement, where a third country agrees to admit refugees permanently when they cannot return home and cannot safely remain where they are. Only a small fraction of the world’s refugees are resettled each year.
For most displaced people, none of these arrives quickly. Protracted displacement lasting five years or more is the norm, and many people spend decades in camps or informal settlements.
How These Categories Translate Into U.S. Law
The United States converts international displacement concepts into domestic immigration categories that do not map perfectly onto the international framework.
Asylum
U.S. asylum law closely mirrors the 1951 Convention’s refugee definition. Any person physically present in the United States may apply for asylum regardless of how they entered or their current immigration status.12Office of the Law Revision Counsel. 8 U.S. Code 1158 – Asylum An applicant must demonstrate a well-founded fear of persecution on one of the same five grounds recognized internationally.
Temporary Protected Status
Temporary Protected Status (TPS) addresses a situation the 1951 Convention largely ignores: people already in the United States who cannot safely return home because of armed conflict, environmental disaster, or other extraordinary conditions. The Secretary of Homeland Security designates specific countries for TPS, and nationals of those countries already present in the U.S. can register for protection from removal and receive work authorization.13Office of the Law Revision Counsel. 8 U.S. Code 1254a – Temporary Protected Status TPS designations are temporary and periodically reviewed for renewal or termination.
Humanitarian Parole
For people outside the United States facing urgent humanitarian circumstances, humanitarian parole allows entry on a case-by-case basis. It does not grant formal immigration status and is not a path to permanent residency on its own. Applicants or their petitioners file Form I-131 with U.S. Citizenship and Immigration Services.14U.S. Citizenship and Immigration Services. Humanitarian or Significant Public Benefit Parole for Aliens Outside the United States
TPS has no direct international equivalent. Humanitarian parole is a discretionary tool with no counterpart in the 1951 Convention. A person’s protections in the U.S. depend heavily on which category they fit, when they arrived, and which country they came from.