Most sociologists define social class as a grouping based on similar social factors like wealth, income, education, and occupation. These factors affect how much power and prestige a person has. Social stratification reflects an unequal distribution of resources. In most cases, having more money means having more power or more opportunities. Stratification can also result from physical and intellectual traits. Categories that affect social standing include family ancestry, race, ethnicity, age, and gender. In the United States, standing can also be defined by characteristics such as IQ, athletic abilities, appearance, personal skills, and achievements.