Eric de Lange (1947-2003), sociologist, researched Socialist Youth of the Netherlands founded in 1960.
From the contact between the Zaanse PSP youth and members of the radical Politeia branch in Rotterdam; movement for young people that had to fill a gap after the disappearance of traditional socialist youth movements. SJ had revolutionary socialist foundations and sought a better society through actions and study circles. In this new movement, Politeians dominated. SJ became a small but very active and disciplined organisation. It tried to uphold the traditional ideals and symbols of the socialist labour movement. Examples included Pentecostal camps, the address title of ‘comrade’ and the wearing of blue shirts.