One of the accusations agains globalization is that it would even out differences between cultures and would make the world a boring place of all the same shops, food, music and so on. Only MacDonalds, Bennetton and Hollywood.
Apart from the fact that cultural differences cannot be maintained and defended by ordinances from well meaning lefties (Wine drinking now becomes an abit all over the globe simply because it is a pleasure and why should Asians to be allowed to....) , there are also two important objections against this thesis of cultural flattening.
a) it is unproven: it might also happen that also in a globalized world cultural differences will remain and will also distribute themselve spotlike all over the world. I hardly see that Italian culinary culture is under serious attack by MacDonalds....
b) also if cultures mixes always more and penetrate and interfuse each other, this does not mean flattening: instead of national and ethnical cultures, we will get regional ones, and then also personal ones or schools of cultural thinkings will evolve as it already exists in music or art, schools which have no limits by ethnicity, continent or nation