Do I have to kill the lawn before putting a raised garden bed on top?

Image by the.sprouts
a la "square foot gardening," so that we can record what we planted where

Question by Yori: Do I have to kill the lawn before putting a raised garden bed on top?
I plan on creating a 16″ deep raised bed on my lawn. Do I have to somehow kill it so that it does not grow into my garden, or will it die and turn into compost when buried 16″ deep?
I’d rather not put paper/cardboard as I plan on organic garden, and who knows what kind of binders/glues these cardboard have in them….

What do you think? Answer below!