This post was originally published by the Christian Science Monitor on July 17, 2013.

When world leaders gathered in London last month to join British Prime Minister David Cameron’s Hunger Summit, they secured pledges of more than $4 billion to fight world hunger. But for all their efforts to address rising food prices, famine prevention and response, and food distribution, hunger and malnutrition will continue unless one of its fundamental root causes is addressed: the role of secure land rights – especially for women.

The poorest and hungriest people on the planet share three key traits: They live in rural areas, rely on the land to survive, and have no legal rights to the land they rely on. This means that the land on which they live or work is owned by someone else, such as a large landowner or the government, and that they therefore have no control over the land and do not have secure rights to stay there for the long term. Often, these landless people are sharecroppers, day laborers, or indentured servants.

Many things lead to or exacerbate landlessness. In many countries, there was highly unequal initial land distribution, meaning a few people own much of the land. More recently, rapid population growth, natural resource degradation, and conflict have led to increased pressure on the land and a growing number of landless people. Finally, women are especially vulnerable to becoming landless because of inequitable inheritance practices.

This landlessness impacts farmers in fundamental ways. It means they have no incentive to invest in the land, with inputs like fertilizer, and no opportunity to make big decisions about the land, like digging wells. Therefore, when they are able to make decisions about what to farm, they generally aim to produce a crop that matures quickly and requires little financial investment.

Obviously, this path that does not lead to sustainable and robust farm output of nutritious food. Conversely, when farmers have secure rights to the land they farm, that means they can make improvements to and choices about the land without fear that it might be taken from them.

The amount of land required to help a family is not large. India has seen great success boosting family nutrition by providing families with small plots of land, as spotlighted in this video. Landesa, the global development non-profit where I serve as a land tenure specialist, worked with the governments of several Indian states to design and implement programs that identify poor landless families and give them small plots of government-owned or government-purchased land. So far, eleven states across India have allocated 210,613 of these plots to poor families.

Research shows that land ownership leads farming families to invest in improvements to their agricultural production. This increases food security for the family directly, through increased food production, and indirectly, through increased incomes.

When women specifically have secure land rights, research shows these gains are even more pronounced. While male farmers may focus on cash crops, women often focus on growing crops that provide their family with good nutrition.