In a world often driven by self-interest, true leadership is measured by one's capacity for humanity.

humanity 由 human（人类）加后缀 -ity 构成，human 表示"人的"，-ity 是表示抽象性质的名词后缀。humanity 在这里指"人性"，即人类特有的仁慈、同情等美好品质。