Board Thread:Theories/@comment-27938131-20160922094959

First, apologies if it has already being discussed but I had it on my mind.

In the chapter 85, Grisha's note confirms he comes beyond the Walls and speaks a bit of it, saying (if I remeber well) it's a place where humans live fine, without the threat of titans. Which makes me wonder, what if the Walls are on an island? The journey of Titan Shifters seems very long, and that may explain why their society would be safe from titans.

What's your opinion? Is it a stupid theory? 