Lawyers are trained, and legal ethics rules require, that they represent a single client or more than one client only if there's absolutely no differences in their interests with respect to the legal matter at hand. In addition, lawyers must do their best to represent the interests and goals of clients with diminished capacity.
The concept of zealous advocacy for a single client was expressed early in the 19th century by Lord Brougham who said "an advocate, in discharge of his duty, knows but one person in all the world, and that person is his client."
Read More