<Tr> <Td> By topic (show) <Ul> <Li> Antisemitism </Li> <Li> Civil Rights <Ul> <Li> 1896--1954 </Li> <Li> 1955--1968 </Li> </Ul> </Li> <Li> Civil War </Li> <Li> Culture </Li> <Li> Demographics </Li> <Li> Diplomacy </Li> <Li> Economics </Li> <Li> Historiography </Li> <Li> Labor </Li> <Li> Medicine </Li> <Li> Military </Li> <Li> Socialism </Li> <Li> Southern </Li> <Li> By state </Li> <Li> Frontier (Old West) </Li> <Li> Technology and industry </Li> <Li> Territory </Li> <Li> LGBT </Li> <Li> Women </Li> </Ul> </Td> </Tr> <Ul> <Li> Antisemitism </Li> <Li> Civil Rights <Ul> <Li> 1896--1954 </Li> <Li> 1955--1968 </Li> </Ul> </Li> <Li> Civil War </Li> <Li> Culture </Li> <Li> Demographics </Li> <Li> Diplomacy </Li> <Li> Economics </Li> <Li> Historiography </Li> <Li> Labor </Li> <Li> Medicine </Li> <Li> Military </Li> <Li> Socialism </Li> <Li> Southern </Li> <Li> By state </Li> <Li> Frontier (Old West) </Li> <Li> Technology and industry </Li> <Li> Territory </Li> <Li> LGBT </Li> <Li> Women </Li> </Ul> <Li> Civil Rights <Ul> <Li> 1896--1954 </Li> <Li> 1955--1968 </Li> </Ul> </Li> <Ul> <Li> 1896--1954 </Li> <Li> 1955--1968 </Li> </Ul>

Over the past two centuries of american history which of the following