Passage Summary: You need empathy to get people to follow moral rules that aren't in their own best interest, and without those rules, you can't have a civilized society.

Conclusion: A civilized society cannot exist without the presence of empathy among its members.

Reasoning: Empathy is a necessary requirement for people to be willing to follow moral codes that demand self-sacrifice for the benefit of others.

Analysis: The argument presents a chain of requirements: Civilization needs X, and X needs Empathy. However, the stimulus never explicitly states that civilization needs moral codes; it only says empathy is needed for those codes. The 'Gap' here is the link between civilized society and the specific moral codes mentioned. Look for an answer that states a civilized society requires its members to follow moral codes that involve self-sacrifice.