AbstractThe current process of globalization has produced an increase in the societal role played by companies, in their power and consequently in their responsibility. Any ethical reflection on companies must therefore be able to rise to the challenge of justifying a critical approach which enables us to rethink the role and thus the legitimacy of companies in modern society, and at the same time provide a universalist approach able to explain moral judgments and the problems of the moral validity of business activity within global economic contexts. This paper sets out to present the essential characteristics of a business ethics which unifies these two approaches. It puts forward a proposal for an integrative business ethics which applies the Discourse Ethics developed by J. Habermas to the business environment. It is defined as integrative since it takes the internal connection between ethics and business as its starting point and because it knows that as an applied ethics, it must combine strictly normative approaches with descriptive ones. As with all proposals, many questions remain open and many issues have yet to be resolved. Despite this, this paper sets out to show that discourse ethics provides a sound platform on which to consider questions of the legitimacy of and consequently trust in our organizations in plural and global contexts.