Final answer:
Scarcity of productive resources is the condition facing all societies, leading to unlimited wants and the need for resource allocation.
Step-by-step explanation:
Scarcity is the condition facing all societies because there is not enough productive resources to satisfy people's unlimited wants. Our resources are limited, such as land, factories, and oil, while our desires for the things we can produce with those resources are unlimited. In other words, we always want more and better things. For example, no matter how much land a society has, people may always want more space for housing or more farmland for agriculture. This scarcity of resources creates the need for societies to make choices on how to allocate those limited resources.