 The OSP is very comparable to other parties formed as orthodox Marxist opposition within social-democratic parties, like Independent Social Democratic Party of Germany - see anti-Stalinist left and centrist Marxism.Les deux journées

Les deux journées, ou Le porteur d'eau ("The Two Days, or The Water Carrier") is an opera in three acts by Luigi Cherubini with a libretto by Jean-Nicolas Bouilly.It takes the form of an opéra comique, meaning not that the subject matter is humorous, but that the piece is a mixture of spoken dialogue and musical numbers.