Abstract. Standard agent and action-based approaches in computer ethics tend to have difficulty dealing with complex systems-level issues such as the digital divide and globalisation. This paper argues for a value-based agenda to complement traditional approaches in computer ethics, and that one value-based approach wellsuited to technological domains can be found in capability theory. Capability approaches have recently become influential in a number of fields with an ethical or policy dimension, but have not so far been applied in computer ethics. The paper introduces two major versions of the theory -those advanced by Amartya Sen and Martha Nussbaum -and argues that they offer potentially valuable conceptual tools for computer ethics. By developing a theory of value based on core human functionings and the capabilities (powers, freedoms) required to realise them, capability theory is shown to have a number of potential benefits that complement standard ethical theory, opening up new approaches to analysis and providing a framework that incorporates a justice as well as an ethics dimension. The underlying functionalism of capability theory is seen to be particularly appropriate to technology ethics, enabling the integration of normative and descriptive analysis of technology in terms of human needs and values. The paper concludes by considering some criticisms of the theory and directions for further development.Key words: capability theory, computer ethics, empowerment, freedom, justice, valuesComputer ethics (CE) -and indeed ethical theory in general -has typically been concerned with the normative analysis of individual intentional action or, somewhat less commonly, the character of individual actors. The standard topics of computer ethics such as invasions of privacy, misuse of personal data and disputed ownership of intellectual property appear to lend themselves well to such analysis, and -because organisations and states are intentional agents tooissues of regulation, legislation, corporate responsibility and other forms of collective action have also been relatively amenable to this approach. However, another set of normative issues exists of equal or arguably perhaps greater importance for which individual action/agent-based forms of analysis are less well suited, such as the role played by computers and associated information and communication technologies (ICT) 1 in globalisation and poverty. These issues are not ignored in CE -many textbooks include at least some discussion of topics such as the 'digital divideÕ -but they fit poorly with standard approaches and challenge CE to define a broader agenda. The purpose of this paper is to delineate what such an agenda might look like, at least in part, and to introduce some theoretical tools that could be brought to bear upon it.At the heart of a broader agenda for CE lies the need for styles of normative analysis that take the domain of value rather than that of agency or action as their departure point, enabling consideration to be given to the full ra...