Both organizations and families are systems. For the successful operation of the system that is marriage, the implementation of four roles is necessary. Carrying out many responsibilities: taking care of each other, caring for the home and children, providing the income the family needs, etc. Being a system, the family needs discipline and rules: otherwise there will be no order in it. The order must change depending on the circumstances because marriage is a long-term choice and must evolve over time to remain functional. And finally, unity and harmony must reign in the family, based on intimacy, mutual assistance and... love. So, four different roles must be implemented in the family in order for all these actions to become possible: Production of results (Production - P), Administration ( Administration - A), Entrepreneurship - E and Integration - I, which make up the abbreviation PAEI. When one or more of the roles is not fulfilled, the marriage will become lacking and risk hitting the rocks. No one can fulfill all four PAEI roles at the same time. A marriage is a complementary team, with one partner taking on one part of the role and the other taking on the rest. This explains why opposites attract. However, conflicts often arise between people with dissimilar behavioral styles. The conflict can go into a destructive phase and lead to divorce. And it can help further development and self-realization. It depends on whether there is mutual respect and trust in the family. This is a book about mutual respect and trust, and how to develop and nurture them in your family.