Millions of years ago, there was no such thing as the wheel; the only way to move things was by carrying or dragging.  One day, some primitive guys were watching their wives drag a dead mastodon to the food preparation area. It was exhausting work; the guys were getting tired just WATCHING.

Then they noticed some large, smooth, rounded boulders, and they had an idea: They could sit on the boulders and watch!

This was the first in a series of breakthroughs that ultimately led to television.