Food insecurity: understanding the causes and the lasting solutions

In 2026, global agricultural output amounts to 4,600 kilocalories per person per day. That is enough to feed 12 billion people, 50% more than the world's population. Yet 2.1 billion people live with moderate or severe food insecurity, and for the first time in UN history two famines were officially declared in the same year: in Gaza and in Sudan.

This paradox sums up the problem on its own. Food insecurity is not a question of production. It is a question of access, stability, conflict and inequality. This guide covers the official definition, the 4 dimensions behind it, its root causes and the ways to act, from emergency giving to the lasting solutions led by NGOs.

What exactly is food insecurity?

Food insecurity is the opposite of food security, a concept defined by the FAO at the 1996 World Food Summit:

“Food security exists when all people, at all times, have physical and economic access to sufficient, safe and nutritious food that meets their dietary needs and food preferences for an active and healthy life.”

This definition rests on four pillars, known as the 4 dimensions of food security. If just one of them fails, people tip into insecurity.

Food insecurity, hunger, malnutrition: three different things

These three terms are often confused, wrongly.

Hunger is a physical sensation linked to an acute or chronic calorie deficit. It is a symptom.

Food insecurity is a condition, with several degrees of severity, describing how hard it is to access an adequate diet reliably. A person facing moderate food insecurity skips meals or compromises on the quality of their food, without necessarily feeling hungry.

Malnutrition covers nutritional deficiencies (wasting, stunting, anaemia) but also overweight and obesity. You can get enough calories and still be severely malnourished in micronutrients (iron, iodine, vitamin A).

How is food insecurity measured?

Two international scales are the benchmark. They do not measure the same thing and complement each other.

The FAO's FIES scale: 4 levels

The Food Insecurity Experience Scale assesses how households themselves perceive their situation, using a standardised questionnaire.

1. Food security: stable, sufficient access.
2. Mild insecurity: worry about being able to obtain food.
3. Moderate insecurity: compromising on variety or quality, skipping meals.
4. Severe insecurity: prolonged deprivation, whole days without eating.

The IPC/CH framework: 5 phases

The Integrated Food Security Phase Classification (IPC/CH) measures objective severity on the ground, with precise thresholds for calories, mortality and acute malnutrition. It is the reference tool for triggering humanitarian alerts.

In 2025, 1.4 million people were classed in IPC 5 (famine) according to the GRFC 2026, notably in Gaza, South Sudan, Sudan, Haiti, Mali and Yemen.

How many people face food insecurity worldwide in 2026?

The latest figures come from the SOFI 2026 report (FAO, IFAD, WHO, WFP, UNICEF) and the Global Report on Food Crises 2026 (GRFC).

• 645 million people chronically undernourished (7.8% of the world's population).
• 2.1 billion facing moderate or severe food insecurity (1 person in 4).
• 2.7 billion unable to afford a healthy diet (1 person in 3).
• 266 million facing acute food insecurity in 47 countries (GRFC 2026).
• 1.4 million in catastrophic conditions (IPC 5), with acute hunger doubling in 10 years.

For a full reading of these figures and how they have changed, our dedicated article covers world hunger in 2026: figures, causes and action.

What are the root causes of food insecurity?

Five factors combine and reinforce one another. Rarely found alone, together they form the equation that plunges a population into crisis.

Armed conflict, the number one driver

Every UN agency reaches the same conclusion: conflict is the leading cause of acute food insecurity worldwide. It destroys harvests, cuts trade routes, uproots farmers and makes local currencies collapse. According to the WFP, 40% of civil wars originate in competition for scarce resources, including food. The link is so deep-rooted that we have given it its own article: conflict and food insecurity.

Climate change

Prolonged droughts in the Sahel, floods in South Asia, cyclones in the Caribbean, El Niño: extreme weather destroys crops and makes subsistence farming ever more uncertain. SOFI 2026 projections estimate that by 2030, 56% of people suffering from hunger will live in Africa, a particularly exposed continent.

Poverty and structural inequality

A healthy diet costs an average of $4.28 PPP a day worldwide, a sum out of reach for a third of humanity. Gender inequality makes matters worse: women have more limited access to land, credit and farming tools. As a result, 26.1% of women face food insecurity, compared with 24.2% of men. The FAO estimates that closing this gap would reduce hunger by 12 to 17%.

Economic shocks and price volatility

Post-Covid inflation, the war in Ukraine sending grain prices soaring, rising energy costs, trade tensions: food prices have become unstable. Meanwhile, official development assistance has fallen back to its 2016 level, according to the GRFC 2026, even though needs have doubled in ten years.

Food waste

A third of the food produced worldwide is lost or wasted, according to the FAO. That covers losses on the farm, losses in transport and storage, and household waste in wealthy countries. In volume, this waste would be enough to feed several billion people. It is the best-documented paradox of global food insecurity.

Focus on Palestine: anatomy of extreme food insecurity

Palestine brings every factor together at its most extreme. In 2025, the IPC officially declared famine in Gaza governorate, an extremely rare event. Three mechanisms combine.

The destruction of farming infrastructure. Bombing from 2023 to 2025 destroyed a large share of the Gaza Strip's cultivated land, greenhouses, irrigation wells and farm roads. Local production now covers only a tiny fraction of needs.

Restrictions on humanitarian access. Food convoys were heavily restricted during the most intense phases of the conflict, with crossing points often closed or subject to lengthy checks. Aid gets through, but in insufficient quantities and irregularly.

Mass displacement. More than 90% of Gazans have been displaced at least once. This cuts people off from their usual distribution points, scatters families and makes food security fundamentally unstable.

LIFE has worked in Gaza for more than 10 years in partnership with the local charity Al-Amal. Despite the war, more than 62,500 hot meals were distributed there in 2025 (source: Ouest-France, May 2025). For a full, on-the-ground overview, visit our Palestine emergency page.

What lasting solutions are there to food insecurity?

Responding to emergencies is essential, but not enough. Five structural levers have proven their worth.

Targeted emergency aid. Food distributions, mobile kitchens, e-vouchers: an immediate response remains vital in crisis zones. It is at the heart of what an emergency humanitarian NGO like LIFE does, working in Gaza, Sudan and Lebanon.

Resilient, local farming. Training in agroecological techniques, distributing drought-resistant seeds, supporting agroforestry, building irrigation wells: these medium-term investments rebuild communities' food sovereignty. They help people move from relying on aid to recovery.

Empowering women. Making it easier for women to access land, farm credit and vocational training is one of the most effective levers documented by the FAO. For the same investment, a woman farmer diversifies her production more and improves her children's nutrition.

Social protection and access to rural jobs. Cash transfer programmes, safety nets, school meals, rural employment guarantees: these schemes create a floor that stops vulnerable households tipping into severe insecurity when shocks hit.

Tackling waste. Better post-harvest logistics in the Global South, less household waste in the Global North, food banks making use of unsold goods: every tonne saved is a tonne that is no longer missing.

How can you act against food insecurity from France?

As an individual, three kinds of action are particularly useful.

Give to a specialist NGO. A one-off gift directly funds a distribution. LIFE's “1 euro = 1 meal” campaign funds one complete meal for every euro given, in the most critical places. To understand exactly how that figure adds up, read our analysis 1 euro = 1 meal: how one euro can feed a person.

Switch to a monthly gift. A direct debit gives the NGO the visibility it needs to plan bulk purchases and sign contracts with local suppliers. It is the most effective way to turn generosity into lasting action.

Benefit from tax relief. Every gift to LIFE qualifies for 66% French tax relief, up to 20% of taxable income. A monthly gift of €20 costs €81.60 net over the year.