In recent years, Westerners have become increasingly disillusioned with multiculturalist policies. Minorities living in America and Europe have remained alienated from and hostile toward mainstream society. This paper shows that not only has multiculturalist policy failed, both the philosophical and scientific assumptions upon which multiculturalist theory is founded are confused and inaccurate. Philosophically, multiculturalism claims that all cultures are equal because cultures cannot be compared-but the judgment of equality between items cannot be made without the possibility of comparing them. Also, it is widely acknowledged that products associated with one culture are in various ways objectively superior or inferior to the products of other cultures. Scientifically, multiculturalist theory claims, in opposition to the facts, that all racial/ethnic populations of intellectually and emotionally identical. In conclusion, the author argues that it would not be wise for Korea to adopt multiculturalist policies that can be seen to be failing all over the Western world.