Citizenship has evolved over time from ancient concepts to modern democratic societies. In ancient Greece, citizenship was granted by birth and affirmed by the mother and assembly. It defined one's ability to participate in government. Romans further developed citizenship to distinguish original citizens from conquered peoples, granting rights to those born to Roman fathers. Modern democratic citizenship is based on popular sovereignty and consent of the governed. It entails both rights and responsibilities of citizens to participate in and support their political system through actions like voting, military service, obeying laws, and constructive civic participation and criticism. Education seeks to develop participatory skills and civic virtues in students to strengthen responsible democratic citizenship.