Really? Cause I'm pretty sure people were killing each other with swords 1000 years ago. Humans have changed tremendously in the last 100 years. We have the internet, we can talk to people on the other side of the planet through monitors while we're watching a movie, playing a game, looking at your phone and eating dinner all at the same time. In 1000 years I wouldn't be surprised if humans were living somewhere other than Earth. We may hardly be human by then.