Social class inequality is a fundamental concept in sociology that examines the unequal distribution of resources, opportunities, and power among different social groups within a society. This article outlines and explains the concept of social class inequality, its causes, and its consequences. It discusses economic factors, social mobility, education, discrimination, and social exclusion as key causes of social class inequality. The consequences of social class inequality include economic disparities, health and well-being disparities, limitations on education and social mobility, and unequal distribution of social and political power. Understanding and addressing social class inequality is crucial for creating a more equitable and just society.