<p>"Multiculturalism has run its course, and it is time to move on." So begins Jonathan Sacks'' new book on the future of British society and the dangers facing liberal democracy.<br><br>Arguing that global communications have fragmented national cultures and that multiculturalism, intended to reduce social frictions, is today reinforcing them, Sacks argues for a new approach to national identity. We cannot stay with current policies that are producing a society of conflicting ghettoes and non-intersecting lives, turning religious bodies into pressure groups rather than society-building forces. <br>Britain, he argues, will have to construct a national narrative as a basis for identity, reinvigorate the concept of the common good, and identify shared interests among currently conflicting groups. It must restore a culture of civility, protect "neutral spaces" from politicization, and find ways of moving beyond an adversarial culture in which the loudest voice wins. He argues for a respon