If a murder realises private profit it is good, it uncovers a threat to their survival, it is bad. But they cannot form the understanding that something has a value independent of their own interests , which undermines their understanding of the world. The selfish cannot form a clear and constant understanding. The unselfish are ruled by a fixed set of values which is more important than themselves and therefore independent of their feelings. This moral code allows them to resist the tyranny of their emotions and form a stable understanding of the world.
Language is the foundation of understanding.
A civilization is the tangible creations of a single community. A group of people become a community when they share the same morality, which in turn allows them to develop a collective intelligence, which reveals itself through a single shared language. The collective, or communal, intelligence of the community is superior to the individual intelligence because it is more than the sum of its citizens efforts . The character of a community is that induced by the founding morality of its understanding . The wisdom of a community is the accumulated experience of its understanding .