Final answer:
The excessive desire for another's valuables that leads to relationship destruction relates to psychology and ethics, and this human behavioral issue is often examined in social studies and economic theory contexts.
Step-by-step explanation:
The question you've asked pertains to a concept which overlaps the areas of psychology, ethics, and social studies. The excessive desire to possess something valuable belonging to someone else to the point of letting envy destroy a relationship is a representation of pathological jealousy or even envy, and can be considered in terms of moral philosophy or behavioral psychology. This situation is a classic example of where human emotions and ethics intertwine, leading to a destructive path if not managed properly.
In contrast, the tendency to attach greater value to things into which resources have been invested than they are actually worth, the desire for power or influence among nations, and the willingness to act unethically for personal gain as highlighted in the reference information, all touch on different aspects of human nature and desire, which are studied within the context of social studies and economic theory.