Social Democratic Party
9 May 1873
The crash of the stock market in Vienna signaled the end of the great European railway boom and brought on the first modern globalized financial crisis.
Nadezhda Konstantinovna Krupskaya became secretary of the RussianSocial Democratic Party 's Bolshevik faction. She held the post until 1917.
Shirley Williams (daughter of Vera Brittain ) became the first member of the Gang of Four, leaders of the newly-founded Social Democratic Party , to win a seat in Parliament : for Crosby, Lancashire.