What does the term social change mean​

From 1868 through the early 1870s the ku klux klan (kkk) functioned as a loosely organized group of political and social terrorists. the klan's goals included the political defeat of the republican party and the maintenance of absolute white supremacy in response to newly gained civil and political rights by southern blacks after the  civil war  (1861-65). they were more successful in achieving their political goals than they were with their social goals during the  reconstruction  era. hope this