Part I analysis the difficulties of dialog in the most pluridisciplinary context which might exist - i.e. bioethico-taking into account the claim for pluralism and the specific expectations of scientists and philosophers. Part II explains the author's prints of view (agnosticism, anthropocentrism and methodological materialism, wild operture of space and time framework). Part III explores the substitution of the complex paradigm of the "ethics committee" to the old simply modern concept of "scientific community" as a model for the whole society.
