Which character can be described as the moral conscience of his college class in the novel, July, July?

David Todd emerges as the moral conscience of his college class. The American presence in Vietnam, either the decision to fight there or the decision to oppose it, defined in large part the Baby Boomer generation that came of age in the 1960s. David decided to abandon a promising baseball career and to leave college in his junior year to serve in a war whose moral imperative he never entirely embraced.