1940s: The dictator Adolph Hitler is the supreme ruler of Germany.

1980s: The dictator Augusto Pinochet is the supreme leader of Chile.

Today: The dictator Saddam Hussein is the supreme leader of Iraq.

1940s: European Jews must carry passes and are marked by the Star of David so they may be identified as non-Aryans.

1980s: Under apartheid, Black South Africans must carry "passbooks" to identify who they are. 

Today: Non-Muslims must wear markers to identify themselves as such under the Taliban government in Afghanistan.

1940s: The Nazi regime carries out a program of genocide against European Jews, gypsies, and other groups.

1980s: In the early 1980s, the Guatemalan military, acting on orders from the country's highest authorities, carry out genocide against the country's majority Mayan population.

Today: The World Federalist Association and other human rights organizations campaign to end genocide forever, beginning in...