Sure - for now. But if you could step into a box in France and walk out of it 5 seconds later in Germany... how long would that last?Take the EU as an example, the Germans and French share a common currency and border and yet the French are still French and the Germans still German.
Hmm, I don't know that there is an "ought" here.And that is the way it should stay.
I disagree with that. I think technology will inevitably erase cultural differences, as it is already doing.The only way humans become like fictional, monolithic Vulcans (whose motto is IDIC, what a contradiction) is if there is a genocidal World War that destroys everywhere on Earth except some small village in Cornwall, who are then left to populate the planet.
Actually there's even more historical precedent. A couple of hundred years back almost everyone lived their entire lives within 20 miles of where they were born. At most, you'd marry and move to a place a couple of villages over. Cultural differences were much more pronounced as a result, because practically every town was isolated from every other. Look at what roads and cars have done to that!
Whichever are the most popular. Cultural changes aren't something people in authority decide on - they just happen. Who decided that Hollywood would largely destroy the British film industry? Nobody made that conscious decision - but everybody who paid to see a Hollywood movie instead of a British one caused the shift to happen collectively.In order to abandon all cultural differences which cultures are abandoned and which culture ascends?
That's how it will be if we ever have mass teleportation. Languages already evolve and mix right now - that'll accelerate a hundredfold when people from all over the world can and do freely intermix. So will every other aspect of culture.