Hally names Charles Darwin as his first "man of magnitude," and he names Leo Tolstoy as his second man of magnitude. Hally defends both men as being geniuses and men that "benefited all mankind." The men that Hally picks for this particular title are good choices, but the men that he picks are not the most important aspect of this particular sequence in the play. Hally could have chosen Fleming, Lincoln, Shakespeare, or even Jesus Christ and adequately defended his position. That's the point. This sequence serves as character building for both Hally and Sam. It shows both characters as well educated and well spoken individuals. Sam may be a servant, but he is more than able to verbally spar with Hally, and Hally doesn't see a problem with discussing these kinds of high level concepts with a servant. The importance of this scene is to show readers that Hally and Sam have a deep relationship with each other, and they have a strong intellectual respect for one another. This relationship is then sharply contrasted with Hally's relationship to his own father.