Contrary to what much of the modern world will claim, character is the fundamental requirement for excellence in every field.
In the late 1990s, President William Jefferson Clinton had an affair with one of his interns. He then lied to a grand jury about the case. During the controversy leading up to his impeachment for perjury, his defenders argued that his lack of character, in this and many other circumstances, did not matter. The economy was booming and the world was at relative peace. They said that Clinton was a good president, and that his character did not matter.