Social class systems are characterized by unequal opportunities for social mobility, meaning that individuals' social status is largely determined by their birth rather than their achievements.

Social mobility refers to the movement of individuals or groups between different social classes, either upward or downward.

Personal achievement is not a determinant of social class, as social class is largely determined by factors such as wealth, occupation, and education.

The upper class is the highest social class in a society and typically consists of individuals with high levels of wealth, power, and prestige.

Social class inequality often leads to unequal opportunities for social mobility, discrimination and prejudice, and social unrest and conflict.

Upward social mobility refers to the process by which individuals or groups move up the social class ladder, typically through education, occupation, or marriage.

The feudal system is not a type of social class system, but rather a political and economic system that existed in Europe during the Middle Ages.

The lower class is the lowest social class in a society and typically consists of individuals with low levels of wealth, power, and prestige.

Genetics is not a factor that contributes to social stratification, as social class is determined by social factors rather than biological factors.

Downward social mobility refers to the process by which individuals or groups move down the social class ladder, typically due to job loss, divorce, or other life events.

Social class inequality often leads to unequal opportunities for social mobility, discrimination and prejudice, and social unrest and conflict.

Intergenerational social mobility refers to the process by which individuals or groups maintain their social class position over generations, typically through the transmission of wealth, education, and social connections.

Caste systems are characterized by fixed social status, endogamy, and occupational specialization, and do not allow for equal opportunities for social mobility.

The middle class is the middle social class in a society and typically consists of individuals with moderate levels of wealth, power, and prestige.

Government policies are not a direct factor that contributes to social mobility, although they can indirectly influence social mobility through factors such as education, occupation, and wealth.