Civil rights movements challenge existing political systems by advocating for the rights and freedoms of marginalized groups, often leading to social upheaval and demands for policy change. These movements expose systemic injustices and galvanize public support, bolstering demands for legal reforms, such as desegregation and voting rights. They pressure governments to acknowledge and address inequalities, often resulting in significant shifts in political power dynamics and cultural attitudes. Ultimately, civil rights movements promote a broader understanding of democracy and accountability, challenging those in power to recognize and rectify injustices.