Traditionally, acquisitions related to the Netherlands have included socialism and the labor movement in the 19th and 20th centuries. Since the 1970s, the social movement has expanded to include environmental issues, human rights, squatters, and similar subjects. The legacy of these new social movements can be found at the Institute as well.
The library collections cover a much larger area of political and economic history, the history of ideas, social conditions, and health care in the Netherlands since the early modern period.
The archival collections are accessible through the index of archives, which includes individual records of archives as well as a list of all archives that deal with the Netherlands (browse: 'Netherlands'). It is also possible to search the IISH catalogue through all materials.