Have ethic issues changed in professions?

Professions are important today due to the growing number and their development. Furthermore there is a technological development unimaginable in the previous centuries. At the beginning it was recognized that there were three professions: Priest, Ruler and Doctor, representing the classical conception of Universe divided into "Macrocosmos", "Mesocosmos" and "Microcosmos" respectively. Modern age means the beginning of a change in this classical conception; that has been arguable, until the actual view that it is difficult to define what an ethical behaviour is in the professionals. This presentation tries to show some of the difficulties and conflicts presented by the technological and professional development.