Question

mention any two happening of 20th century in support of calling it "the age of extremes

Answer 1

Extremely odd question…and difficult. There are in fact many sociopolitical situations.
There are two 20th Centuries, one is the first half 1900–1945, and the second half 1945–1990. Eric Hobsbawm called it “the short 20th Century” or “The Age of Extremes”.
The issues in the first half of the 20th Century was imperialism, colonialism and the rise of conservative and reactionary forces and also social democracy in liberal nations, to counter the rise of communism and revolution. World War I was declared to prevent revolution in conservative nations like the kaissereich and tsarist russia.
The second half of the 20th Century is a classic great power rivalry between USA-USSR across the globe, ending with American victory and the rise of neoliberalism and with it neo-colonialism.
The sociopolitical story overall is this:
The 20th Century was the age of the greatest liberation in the history of mankind, where women, people of colour, minority religious and non-believers enjoyed unprecedented freedom of movement, and other civil liberties, greater than any other period in human history to which nothing is comparable. Old fashioned colonialism died and national self-determination achieved consensus. It was a time of rapid change in society and culture, new opportunities for education and advancement.
In that respect, Lenin is the true architect of the 20th Century and Marx is the prophet of the 20th Century. There is also the transformation by science and technology which is so sudden and so shocking that future generations might well divide history pre and post-20th Century.
if u like my answer plzz mark as brainliest one