The Left group, later called Historical Left by historians to distinguish it from the left-wing groups of the 20th century, was a liberal and reformist parliamentary group in Italy during the second half of the 19th century. The members of the Left were also known as Democrats or Ministerials. The Left was the dominant political group in the Kingdom of Italy from the 1870s until its dissolution in the early 1910s.

Trasformismo was the method of making a flexible centrist coalition of government which isolated the extremes of the political left and the political right in Italian politics after the Italian unification and before the rise of Benito Mussolini and Italian Fascism.