What is the primary factor that defines social class in America?

The primary factor that defines social class in America is income, which refers to the money people earn from their jobs, investments, and other sources. Higher income usually allows individuals to access better education, healthcare, and living conditions, which can lead to greater opportunities. For example, a family making a high income can afford to send their children to private schools, giving them a better chance at good jobs in the future. In contrast, families with lower incomes may struggle to meet basic needs, which can limit their opportunities. Therefore, income shapes not only people's lifestyles but also their long-term prospects and social mobility.