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 IISH as well.
In the Russian and Eastern Europe collections at the IISH, Russia and the former USSR are dominant. Additional collection development efforts cover most countries in Eastern Europe that became communist after 1945.