508 BCE: Cleisthenes introduces democratic reforms in Athens, Greece.
1215: The Magna Carta, signed by King John of England, establishes limitations on the power of the monarchy and grants certain rights to English nobles.
1787: The United States Constitution is written, establishing a federal system of government with a representative democracy.
1848: The Revolutions of 1848 lead to widespread demands for democratic reforms in Europe.
1917: The Russian Revolution overthrows the tsarist autocracy and establishes a socialist government.
1945-1960s: The post-World War II era sees a wave of decolonization and the establishment of democratic governments in newly independent nations.
1989: The fall of the Berlin Wall and the collapse of communist governments in Eastern Europe lead to democratic reforms in the region.
21st century: Democracy continues to be a dominant form of government around the world, but faces challenges such as rising authoritarianism, polarization, and threats to the rule of law. The use of technology and social media in politics also brings new challenges and opportunities for democracy.