This document defines economics as the study of how individuals and societies use scarce resources to satisfy unlimited wants. It explains that scarcity means resources are limited and cannot meet all wants and needs. Resources include natural resources, human resources like skills and labor, and capital resources which are manufactured goods used to produce other goods. Because resources are scarce, societies cannot produce enough to satisfy all wants and must make choices about what to produce that involve sacrifices of producing less of other goods. The entrepreneur combines resources to produce goods and services.