Means of production
The means of production can be owned by different people in different ways in different societies. Capitalism is when the means of production are owned privately. A capitalist society has a market, where things can be sold and bought. Capitalism also has wage labor. Other societies can be socialist, meaning the means of production are owned in common, either by the workers themselves or by the state. A socialist society may also have a market, depending on the variation of socialism.