Historical definitions and practices of conservation have a limited focus on protecting wildlife rather than having a broader perspective of nurturing the entire eco system. Dale Lewis has introduced market based conservation that recognizes the interconnectedness between, and therefore seeks to protect, a broad range of wildlife species and livelihoods with human beings playing a central role as protectors of the entire ecological system. His livelihoods programs have transformed families across Zambia from food-insecure and poachers to major distributors of food to millions of people across Zambia and beyond. As a result poaching around the valley has reduced by about 50%. Dale is currently working in the Luangwa Valley, home to nearly twenty percent of the human population and a significant chunk of the wildlife population in Zambia. His success has compelled the Wildlife Conservation Society to adopt market based conservation and has attracted big global commercial brands such as Wal-mart and the government of Zambia to work with him in spreading his work across Zambia and to other parts of southern Africa.