In the Jewish diaspora, the nature of Zionist youth movements has varied in time and place. During periods when the general Zionist movement has been strong, such as that preceding the Six-Day War, movements have been particularly active. As well as acting towards Zionist causes, the movements have been seen as an important Jewish education and socialisation when it has not been otherwise available. Hence, with the development of stronger community structures, youth movements have often played a lesser role. Many youths, particularly in the large Jewish population of North America, have opted for Jewish social groups without ideological pursuits.