The Formation of the United Nations (1945): Established to promote international cooperation and peace.
The Atomic Bombings of Hiroshima and Nagasaki (1945): Introducing the world to the devastating power of nuclear weapons.
The Great Depression (1930s): The worst economic downturn in the history of the industrialised world.
World War I (1914-1918): The first modern global conflict, leading to major political changes worldwide.
The Abolition of Slavery (19th century): Various movements leading to the end of the transatlantic slave trade.
The Industrial Revolution (late 18th to early 19th century): Major changes in agriculture, manufacturing, and transportation.