I take this to mean that a lot of religious, cultural, and behavioral baggage from around the world will have to be left behind in order for that to happen.
I'd imagine that over the centuries, increased mobility paired with instantaneous worldwide communication (the netz) would eventually erase cultural differences.
As sad as it sounds, it's already happening - about 2 languages die every month. Dialects of American English are losing their distinctiveness. People are abandoning religion. A Chinese man and his Canadian wife can get a delicious Ethiopian meal in Rome.
The internet is only speeding this process up.