<p><span>The melting pot has been the prevailing ideal for integrating new citizens through most of America’s history, yet contemporary elites often reject it as antiquated and racist. Instead, they advocate multiculturalism, which promotes ethnic boundaries and distinct group identities. Both models have precedents across the centuries, as Jens Heycke demonstrates in a contribution to the debate that incorporates an international, historical perspective.</span></p><p><span>Heycke surveys multiethnic polities in history, focusing on societies that have shifted between the melting pot and multicultural models. Beginning with ancient Rome, he demonstrates the appeal of a unifying, syncretic identity that diverse individuals can join, regardless of their ethnic or racial origins. He details how early Islam, with its ideal of an inclusive</span><span> </span><i>ummah</i><span>, integrated diverse groups, and even different faiths, into a cohes