Social exclusion refers to the lack of participation in social, economic, political and cultural life experienced by groups and individuals. It can be caused by discrimination, lack of basic needs, lack of citizenship rights, and unequal power relations. Reversing social exclusion requires promoting justice, recognition of human worth, self-determination, and solidarity. It also involves balancing individual and collective rights. Social exclusion often leads to poorer health, education, and income inequality that become self-reinforcing over time. Strong policies are needed to eliminate inequalities in areas like education and employment.