1900-1910 End of the middle ages.
1910-1920 The Last World war.
1920-1930 Party time.
1930-1940 Hangover.
1940-1950 Second ( sic ) World War and nukes.
1950-1960 Cold War and nukes.
1960-1970 Revolution and free pussy.
1970-1980 Terrorism, bad music, war and peace.
1980-1990 The Drab Years in the West, reforms elsewhere, computers everywhere.
( This decade also known as the Fad years is the most important one for teens of 2014 : from movies, TV shows, music & music videos, video games, portable music and clothes, all the things that your parents bored you about ( A.K.A. Prehistory ) appeared and shaped the culture and lifestyle you now enjoy )
1990-2000 New World Order : i.e. since Peace couldn’t do the job, unbridled capitalism spreads over the globe instead.
Then in 2000, due to a computer bug, the World was reset* so that all the knowledge I just shared is since useless.
Sorry to have interrupted your daze, nap or selfie as the case might have been,
Tay.
P.S. Please do not use this Post to base your homework on unless your teacher has a serious sense of humor!
* Which you don’t remember because you were quite young then, some not even born.
Definitive Lapse of Reason 