The British Party System (1944) is a "playlet" by George Bernard Shaw satirically analysing the origins of the party system in British politics in the form of a pair of conversations between scheming power-brokers at various points in history, who devise it and adapt it to suit their personal ends.

King William III and Robert Spencer, 2nd Earl of Sunderland discuss the latter's plan to create government through parties, rather than by choosing ministers on individual merit.

25 years later, Robert Walpole and Sutherland's son Charles Spencer, 3rd Earl of Sunderland, argue about relative power of the King and the House of Lords.

Walpole resists Sunderland's plans to restrict the number of peerages in the Upper House.

Shaw follows this playlet with the provocative comment: This lands us in the unexpected conclusion that government by Parliaments modelled on the British Party System, far from being a guarantee of liberty and enlightened progress, must be ruthlessly discarded in the fullest agreement with Oliver Cromwell, Charles Dickens, John Ruskin, Thomas Carlyle, Adolf Hitler, Pilsudski, Benito Mussolini, Stalin and everyone else who has tried to govern efficiently and incorruptly by it, or who has studied its operation with a knowledge of its history and that of the Industrial Revolution.