Possibly in your own lives you have experienced thisa quarrel that was hard to understand. Perhaps if you think back you will identify the third party, hitherto unrecognized, as the cause of the whole trouble.
It is an interesting idea. It is only true if it is true for you. Such is Scientology, such is philosophy.
The world is often nervous about new ideas. Yet it is on them that the world moves.
You can learn more about the cause of conflict in the booklet How to Resolve Conflicts. The same information can also be found in the comprehensive Scientology Handbook, based on the works of L. Ron Hubbard. In todays troubled and strife-torn world, to be able to resolve conflicts is a valuable skill. You can use this information to make the world a better and safer place.