Human evolution divided by continents

We could have each continent not speak or trade with each other for a thousand years. We could see how technology develops when everyone isn’t copying and using the same things. The different evolutionary branches of what smartphones could have become, or new technological discoveries and advancements.We just need to make sure no one is peeking, cheating or planning on taking over the world. If they try to take over then they may not see what those countries could have developed.