Problem: The family... 1. Has historically been one of the key institutions in almost every society. past, and present 2. Has adapted its structure and function over time to cope with the changing nature of societies 3. In the U.S., is defined not only by its individual members, but also by local, state, and federal governments' definitions of what constitutes a family 4. At the global level, has experienced an increase in the relocation of family members to other regions of the world to find work e. All of the above