natural world as an important thing rather than simply as an object of thematic study, and, secondly, by its commitment to making connections". More recently, in an article that extends ecocriticism to Shakespearean studies, Estok argues that ecocriticism is more than "simply the study of Nature or natural things in literature; rather, it is any theory that is committed to effecting change by analyzing the function–thematic, artistic, social, historical, ideological, theoretical, or otherwise–of the natural environment, or aspects of it, represented in documents (literary or other) that contribute to material practices in material worlds". This echoes the functional approach of the cultural ecology branch of ecocriticism, which analyzes the analogies between ecosystems and imaginative texts and posits that such texts potentially have an ecological (regenerative, revitalizing) function in the cultural system. As Michael P. Cohen has observed, "if you want to be an ecocritic, be prepared to explain what you do and be criticized, if not satirized." Certainly, Cohen adds his voice to such critique, noting that one of the problems of ecocriticism has been what he calls its "praise-song school" of criticism. All ecocritics share an environmentalist motivation of some sort, but whereas the majority are 'nature endorsing', some are 'nature sceptical'. In part this entails a shared sense of the ways in which 'nature' has been used to legitimize gender, sexual and racial norms (so homosexuality has been seen as 'unnatural', for example), but it also involves scepticism about the uses to which 'ecological' language is put in ecocriticism; it can also involve a critique of the ways cultural norms of nature and the environment contribute to environmental degradation. Greg Garrard has dubbed 'pastoral ecology' the notion that nature undisturbed is balanced and harmonious, while Dana Phillips has criticised the literary quality and scientific accuracy of nature writing in The Truth of Ecology. Similarly, there has been a call to recognize the place of the environmental justice movement in redefining ecocritical discourse. In response to the question of what ecocriticism is or should be, Camilo Gomides has offered an operational definition that is both broad and discriminating: "The field of enquiry that analyzes and promotes works of art which raise moral questions about human interactions with nature, while also motivating audiences to live within a limit that will be binding over generations". He tests it for a film adaptation about Amazonian deforestation. Implementing the Gomides definition, Joseph Henry