Choose topic: Check!
Preliminary research: Check!
Come up with thesis: Check!
In depth research: Ooooooh, shoot. My thesis holds absolutely no water at all. In fact, I not only didn't know enough about the topic, I didn't know enough about the time period for my conclusions to make any sense whatsoever.
Which puts us right back at step two. I have a topic. That's it. No thesis, no research, no idea of what the heck to write about.
20 pages due in 5 days, and I'm starting from scratch.
Once upon a time there was a piece of toast. It looked just like me. I am toast. The end.