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Pioneers

Wangari Maathai

Terra Humana editorial teamLast updated: 2026-10-147 min read

A small tree nursery in the green highlands of East Africa: rows of young seedlings in bags and pots under a simple shade roof

In brief

Kenyan biologist who founded the Green Belt Movement, had women plant millions of trees and received the Nobel Peace Prize in 2004.

Life
1 April 1940 to 25 September 2011
Origin
Nyeri, central Kenya
Background
biologist, first woman in East and Central Africa with a doctorate
Known for
the Green Belt Movement, tree nurseries run by women
Main work
Green Belt Movement (from 1977); memoir Unbowed (2006)
Honours
Right Livelihood Award (1984), Goldman Environmental Prize (1991), Nobel Peace Prize (2004)

Who was Wangari Maathai?

Wangari Maathai was a scientist who went back to the soil. Born in 1940 in the highlands around Nyeri in central Kenya, she became the first woman in East and Central Africa to earn a doctorate, and then devoted her life to something very simple: planting trees, together with the women of her country. From this grew the Green Belt Movement, one of the largest tree-planting movements in the world, and in 2004 the Nobel Peace Prize.

What makes her so important is the connection she saw. For her, deforestation, eroded fields, the lack of firewood and clean water, and the poverty of rural women were not separate problems but one. Whoever planted a tree was doing something about all of them at once.

Her life

Maathai grew up in the countryside of central Kenya. She studied biology in the United States, at Mount St. Scholastica College in Kansas (1964) and at the University of Pittsburgh (1966), and in 1971 received her doctorate from the University of Nairobi, the first woman in East and Central Africa to do so. There she taught veterinary anatomy, became head of department in 1976 and associate professor in 1977, again as the first woman in the region in each role.

Through her involvement in the National Council of Women of Kenya, which she later chaired from 1981 to 1987, she listened to women from the countryside. As she recalled in her Nobel lecture, they named what they lacked: firewood, clean drinking water, a balanced diet, shelter and income. In 1976 she brought the idea of community tree planting into the council. In 1977 it became the Green Belt Movement.

Later she also went into politics. In 2002 she was elected to the Kenyan parliament for the Tetu constituency and became Assistant Minister for Environment and Natural Resources. She died on 25 September 2011 in Nairobi.

The idea

The Green Belt Movement was built on a simple exchange. Women's groups set up their own nurseries, raised seedlings and planted them on farms, at schools and churches, and in strips of public land, the green belts. For every seedling that was planted and survived, the group received a small payment. As Maathai explained, the movement paid less for introduced species and more for indigenous and fruit trees. In this way, planting created income, knowledge and independence at the same time. The women no longer had to buy seedlings from the forestry service; they grew them themselves.

Planting led to more. Whoever cares for trees begins to ask who owns the land and who decides about it. Maathai combined the work in the nurseries with civic education, and the movement became a voice for the protection of public land. She defended Uhuru Park in the centre of Nairobi against a planned high-rise, and Karura Forest on the edge of the city against being parcelled out. Both remained public, and Karura is today a forest open to the people of Nairobi.

The Nobel Committee summed up her approach in a simple phrase: she thinks globally and acts locally. She herself saw the care of land, water and forests as work for peace, because where resources are scarce and contested, violence grows.

The work

Her main work is the Green Belt Movement. According to the Right Livelihood Foundation, about 600 nurseries with 2,000 to 3,000 women and around 2,000 green belts of about 1,000 seedlings each existed in the early 1980s; more than half a million schoolchildren were involved. In 1986 a Pan-African Green Belt Network was founded, which carried the approach to other countries.

She told her story in the memoir Unbowed (2006) and in other books, among them The Challenge for Africa (2009) and Replenishing the Earth (2010).

What became of it

How many trees were planted can only be stated with year and source, and the figures come from the movement's own reports. According to the Right Livelihood Foundation, the women reported more than 20 million trees by the end of 1993; the Goldman Environmental Prize named over 20 million trees and around 5,000 nurseries in Kenya; at the award of the Nobel Peace Prize in 2004 the Nobel Foundation spoke of over thirty million.

Her honours trace her path: the Right Livelihood Award in 1984 for converting the Kenyan ecological debate into mass action for reforestation, the Goldman Environmental Prize in 1991, and in 2004 the Nobel Peace Prize for her contribution to sustainable development, democracy and peace. She was the first African woman to receive it.

What we learn from Wangari Maathai

Terra Humana takes from Wangari Maathai the insight that a tree is never only a tree. Whoever plants one also changes the relationship between people and land.

We also take her attention to the nursery. A movement that raises its own seedlings from local seed becomes independent and learns what grows where. That she deliberately encouraged fruit trees and trees suited to farming points in the same direction as our own work: plants that feed people and serve the soil. And we take her steadfastness. Ecological restoration needs more than good soil; it needs people who stand by a place for decades. That, too, is part of what we call rehumanization.

Frequently asked

Who was Wangari Maathai?

Wangari Maathai was a Kenyan biologist and environmentalist, born on 1 April 1940 in Nyeri, Kenya, and died on 25 September 2011. She was the first woman in East and Central Africa to earn a doctorate, and in 1977 she founded the Green Belt Movement, in which women planted trees and earned an income from doing so. In 2004 she became the first African woman to receive the Nobel Peace Prize.

What is the Green Belt Movement?

The Green Belt Movement grew from Maathai's idea, which she brought into the National Council of Women of Kenya in 1976, of planting trees together in communities. It was founded in 1977. Women's groups set up their own tree nurseries, raised seedlings and were paid for every seedling that was planted and survived. Trees were planted on farms, at schools and churches and in strips of public land, the green belts that gave the movement its name.

How many trees did the Green Belt Movement plant?

The figures depend on the year and the source and come from the movement's own reports. According to the Right Livelihood Foundation, the women reported more than 20 million trees planted by the end of 1993. The Goldman Environmental Prize spoke of over 20 million trees and around 5,000 nurseries. When she received the Nobel Peace Prize in 2004, the Nobel Foundation spoke of over thirty million trees. Today the movement's website shows considerably higher counts that include later programmes.

Why did Wangari Maathai receive the Nobel Peace Prize?

The Norwegian Nobel Committee awarded her the 2004 Peace Prize for her contribution to sustainable development, democracy and peace. The committee described her approach to sustainable development as holistic, embracing democracy, human rights and in particular women's rights. Maathai herself argued that careful management of land, water and forests prevents conflict, because scarcity and the struggle over resources feed violence.

What books did Wangari Maathai write?

Her best-known book is the memoir Unbowed, first published in October 2006. She also wrote The Green Belt Movement, about the approach of her movement, The Challenge for Africa (2009) and Replenishing the Earth (2010), on the spiritual values behind care for the earth. The documentary Taking Root: The Vision of Wangari Maathai (2008) tells the story of her work.

Rows of zaï planting pits filled with manure on crusted Sahel soil, young trees behindNext in this themeYacouba SawadogoFarmer from Burkina Faso who improved the traditional zaï planting pits, grew a forest on barren land and taught the method to thousands.

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Sources

  • Right Livelihood Foundation, Wangari Maathai, laureate page (award 1984)
  • Nobel Foundation, The Nobel Peace Prize 2004, Wangari Maathai, facts and biographical notes
  • Maathai, W., Nobel Lecture, Oslo (10 December 2004)
  • Maathai, W., acceptance speech for the Right Livelihood Award, Right Livelihood Foundation
  • Goldman Environmental Prize, Wangari Maathai, Africa 1991
  • Green Belt Movement, Wangari Maathai, biography, and Tree planting and water harvesting (accessed October 2026)
  • McGill University, Beatty Memorial Lecture 2002, biography of Wangari Maathai
  • Maathai, W., Unbowed: A Memoir, New York (2006)
  • Nation (Nairobi), Prof Maathai relentlessly fought state to save Uhuru Park, Karura Forest
  • Merton, L. and Dater, A., Taking Root: The Vision of Wangari Maathai, documentary, Marlboro Productions (2008)

Last updated: 2026-10-14