i have been summarizing some of the main themes and ideas from my new book, why diverse democracies fall apart. There's also a firt kind of question which i think it's helpful to think through when we talk about revision that we should embrace for how to make ethnically and religiously diverse democracys work. And that is what kind of metaphor can help to guide us in thinking through the amount of commonality or the amount of difference that we should sustain in that kind of society. The most famous metaphor, which was very influential in 19 fiftiesad 19 sixties, is that of the melting pot. It is based on a deeply moving play by israel sangwil