Bruce Charles "Bill" Mollison (born 1928 in Stanley, Tasmania) is an Australian researcher, author, scientist, teacher, and biologist. Permaculture is an integrated system of design which Mollison co-developed with David Holmgren, and it encompasses not only agriculture, horticulture, architecture, and ecology, but also economic systems, land access strategies, and legal systems for businesses and communities. In 1978, Mollison collaborated with Holmgren and they wrote a book called Permaculture One. Mollison founded The Permaculture Institute in Tasmania, and created a training system to train others under the umbrella of Permaculture.[5] Mollison's system of train the trainer has taught thousands of people how to grow food and be sustainable using the Permaculture method.

He received the Right Livelihood Award in 1981 with Patrick van Rensburg.

Permaculture (permanent agriculture) is the conscious design and maintenance of agriculturally productive ecosystems which have the diversity, stability, and resilience of natural ecosystems. It is the harmonious integration of landscape and people providing their food, energy, shelter, and other material and non-material needs in a sustainable way. Without permanent agriculture there is no possibility of a stable social order. Permaculture design is a system of assembling conceptual, material, and strategic components in a pattern which functions to benefit life in all its forms. The philosophy behind permaculture is one of working with, rather than against, nature; of protracted and thoughtful observation rather than protracted and thoughtless action; of looking at systems in all their functions rather than asking only one yield of them; and of allowing systems to demonstrate their own evolutions.