By illuminating the epistemological backgrounds of ecological-economic research, the authors lay foundations for interdisciplinary environmental research and offer guidelines for practical action. In close contact to the findings of present-day biology and economics, they demonstrate the fruitfulness as well as the shortcomings of modern science for the understanding of the proper place of humankind in nature.. Frequently, current problems in the fields of economics, ecology, politics, philosophy and biology are discussed in a kind of dialogue with thinkers and poets like Bacon, Quesnay, Kant, Goethe and Novalis. On the other hand, the book offers traits of the Anglo-Saxon tradition of thought: a precise, analytical approach to theory and a pragmatic approach to action. Both approaches are used by the authors complementarily.