If you believe a culture needs some critical mass of adherents in order to be of value, then you wind up with the interests of would-be defectors pitted against the old-school hold outs -- they can't both live the culture they want. (I feel like the arguments over who should get their way would be analogous to the ones folk have about what, if anything, is owed to the "losers" from new trade deals.) While it was a nice essay, it seems like it left standing a case for modern multiculturalism beyond identity yoking for the benefit of the yoked.