Work on global ethics looks at ethical connections on a global scale. It should link closely to environmental ethics, recognizing that we live in unified social-ecological systems, and to development ethics, attending systematically to the lives and interests of contemporary and future poor, marginal and vulnerable persons and groups within these systems and to the effects on them of forces around the globe. Fulfilling these tasks requires awareness of work outside academic ethics alone, in other disciplines and across disciplines, in (...) public debates and private agendas. A relevant ethics enterprise must engage in systematic description and understanding of the ethical stances that are expressed or hidden in the work of influential stakeholders and analysts, and seek to influence and participate, indeed embed itself, in the expressed and hidden choice-making involved in designing and conducting scientific research and in policy analysis and preparation; it will contribute in value-critical and interpretive policy analysis. It will explore how the allocation of attention and of concern in research and policy depend on perceptions of identity and of degrees of interconnection, and are influenced by the choice or avoidance of humanistic interpretive methodologies. The paper illustrates these themes with reference to the study of climate change. (shrink)