'An Inspector Calls' timeline of context By Beth Underwood Apr 15, 1912 Titanic sinks Jun 11, 1912 Oreos introduced Jul 28, 1914 First world war Oct 12, 1915 Edith Cavell murdered Jul 1, 1916 Battle of Somme started Nov 18, 1916 End of the Battle of the Somme Feb 6, 1918 Limited numbers of women are given the vote Dec 23, 1919 Exclusion of women from many jobs is made illegal Jul 30, 1921 Insulin was discovered by Frederick Banting Jun 28, 1922 Irish Civil War breaks out Oct 23, 1922 Conservative Andrew Bonar Law becomes prime minister Jan 25, 1924 First winter olymic games May 7, 1928 All women over the age of 21 get the vote Sep 30, 1928 Alexander Fleming discovers penicillin Oct 24, 1929 Wall Street Crash sparks the Great Depression Sep 22, 1934 Gresford Mine Disaster kills 266 in North Wales Jul 7, 1937 Second world war