我们的道德情感既限制个体滥用公益（common good ） ， 表现为“我”与“我们”之间的冲突；也维持群体的凝聚力，支持“我们”与“他们”之间的竞争。
Our moral sentiments both limit individuals’ abuse of the common good, expressed in the conflict between “me” and “us,” and maintain the coherence of the group, to support the competition between “us” and “them.”