This classic text continues to offer a balanced treatment of the underlying mechanisms and evolutionary bases of behaviour with a focus on the importance of evolutionary theory for the unification of the different behavioural disciplines. The new edition has been thoroughly rewritten with coverage of recent work in the field.

A household icon of the environmental movement, Aldo Leopold (1887-1948) may be the most quoted conservationist in history. A Sand County Almanac has sold millions of copies and Leopold's writings are venerated for their perceptions about land and how people might live in concert with the whole community of life.