Is the liberal state secular? How much state-religion separation is necessary to secure liberal-democratic ideals

Is it a mistake to assume that liberal democracy requires a strict separation of state and religion like the French or US model? In her new book, Cécile Laborde starts from four universal liberal-democratic ideals and asks how much, and what kind of, state separation from religion is required to secure these ideals. By extracting the minimal secular core of liberal democracy she shows that there is a broad range of permissible secularisms.