The Polpart-project is funded by an Advanced Grant from the European Research Council. ERC Advanced Grants allow exceptional established research leaders of any nationality and any age to pursue ground-breaking, high-risk projects that open new directions in their respective research fields or other domains. The ERC Advanced Grant funding targets researchers who have already established themselves as independent research leaders in their own right. The grant was awarded to prof. dr. Klandermans at the VU University of Amsterdam.