The evolution of social exploitation, Richard Machalek; Darwin's anthropomorphism - an argument for animal-human continuity, Eileen Crist; internal selection and cultural evolution, Bernd Baldus; ecological theory and the evolution of complex human communities, William S. Abruzzi; interaction as a concept basic to human ecology - an exploration and synthesis, Gerald L. Young; explorations of culture and nature - ecological feminism and the enrichment of human ecology, Kari Marie Norgaard; sustainable development as a sociologically defensible concept - from foxes and rovers to citizen workers, Adam S. Weinberg, David Pellow and Allan Schnaiberg; an ecological investigation of interstate migration in the United States, 1985 - 1990, Dudley L. Poston, Jr and Michael Xinxiang Mao.