Revolutionary Socialist Party (Netherlands)

The Revolutionary Socialist Party (Dutch: Revolutionair Socialistische Partij or RSP) was a Dutch socialist political party, that has been variously characterized as Trotskyite and syndicalist. In 1935 it merged with the Independent Socialist Party (OSP) to form the Revolutionary Socialist Workers' Party (Dutch: Revolutionair Socialistische Arbeiderspartij, RSAP), but most of the former OSP members left the united party the same year.Henk Sneevliet was the RSP/RSAP's undisputed leader throughout its existence, as well as its only Representative.

The oldest predecessor of the Revolutionary Socialist Party is the Revolutionary Socialist Union (Dutch: Revolutionair Socialistisch Verbond; RSV), a group of dissidents from the Communist Party Holland (CPH) led by Henk Sneevliet. Another predecessor is the Socialist Party (Dutch: Socialistische Partij; SP), a syndicalist party, which was closely linked to the anarcho-syndicalist trade union National Workers' Secretariat (NAS).

In 1929 former members of both the Revolutionary Socialist Union and the Socialist Party founded the Revolutionary Socialist Party. Both parties opposed both the reformist social-democracy of the SDAP and the CPH. A leading person in the foundation was Henk Sneevliet, a prominent former member of CPH and an associate of Leon Trotsky. The Central Intelligence Service, the Dutch secret service at the time, attributed the foundation of the RSP to Sneevliets personal need for power and glory, from which he was blocked in the CPH which distrusted the "trotskyite" Sneevliet.

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