In the 20th century, we had a century where at the beginning of the century, most of the world was agricultural and industry was very primitive. At the end of that century, we had men in orbit, we had been to the moon, we had people with cell phones and colour televisions and the Internet and amazing medical technology of all kinds.
I've never really seen archaeology as being any different from history. What I love are the stories of human beings that were around 1,000 years ago and how they lived - archaeology is another aspect to that.