1920 was the year that women were granted the vote in America. In Britain they were granted the vote in 1918.
It was in 1921 that insulin was discovered. Diabetes had been recognized as a distinct medical condition for many years, but its cause was a mystery until 1921.
In 1922 the Tomb of Tutankhamen was discovered by Howard Carter, after several years of finding very little. The discovery was important as it was the first royal Egyptian mummy that had been found untouched since his burial. On the right you can see Carter next to the sarcophagus of the Pharaoh.
1924 First Olympic winter games. The first Winter Olympic Games where actually called “The International Winter Sports Week” and went on for 11 days in the French Alps. Lenin dies and is effectively succeeded by Stalin.
1925 Flapper dresses were in style. Benito Mussolini assumes dictatorial powers. He would go on to rule Italy in parts up to the near end of the war.
1926 Houdini died on Halloween, from peritonitis caused by a ruptured appendix. Many believe that his appendix was ruptured from a blow to his abdomen from a college student. Houdini was known for his tremendous physical condition, and could withstand many blows to the abdomen by tensing his muscles.
1927 was the year that the BBC was founded. It was also the year for the first talking movie The Jazz Singer. The world population reached 2 Billion during this year as well.
1928 The first Oxford English Dictionary published. Alexander Fleming rediscovers Penicillin, leading to the wide production of antibiotics.
1929 Wall Street Crash in this year brings about the Great Depression and with it would bring radical changes all over the world, including helping Hitler take power which itself would bring about WW2.
The choices made in the 1920’s would go on to have dire effects in the 1930’s with the rampant militarisation worldwide being a major cause of WW2, one which was very much started in the 1920’s.