the world has changed more in the past 100 years than it did in the previous 1000 years. i agree with Blue. even if all the words have been used before, you can still come up with original ideas. even original ideas are based on things that have been already done, but it's impossible not to. was it isaac newton who said something about standing on the shoulders of giants? we all just build on the work of those who came before us, but that does not mean that we don't do original work.