Bastiaan R. Rijpkema is Associate Professor of Jurisprudence at Leiden University, the Netherlands. He received his LLB in Law at Erasmus University Rotterdam (2010) and his LLM in Jurisprudence and Philosophy of Law (cum laude) from Leiden University (2011). In 2015 he obtained his PhD at Leiden University with a dissertation on militant democracy, which was published in Dutch as Weerbare democratie: de grenzen van democratische tolerantie (Nieuw Amsterdam, 2015). For Weerbare democratie he was awarded the prize for the best Dutch political book of the year in 2016, the Prinsjesboekenprijs. In 2017 he won the New Scientist Wetenschapstalentprijs 2017 (New Scientist Science Talent Prize), the prize for the most talented young researcher of the Netherlands and Flanders (Dutch-speaking Belgium).