The life of Wangari Muta Maathai (1940–2011) was strongly shaped by her rural environment, missionary education, and exposure to university education in the United States and Germany. Her interactions with other women—her mother, teachers, and grassroots women—also had a great impact on her work and commitment. In the midst of enormous challenges and obstacles, she created a formidable Green Belt Movement (GBM) to empower grassroots women. By mobilizing women to plant and care for trees, Maathai changed the thinking and practices of conserving the environment at a time when dominant global thinking on the environment and women’s role in society was grappling for transformation. Hence the dynamics of local and international forces coalesced in the work of the GBM. Local experiences also infused global thinking and appreciation of struggles for democratic governance, peace, and sustainable development. Consequently, Professor Maathai’s ingenuity and persistence were widely recognized and honored, and earned her the Nobel Peace Prize in 2004.