I thought I'd toss in a quick clarifier about a few things, especially Social Contract.

A document or one-sheet like we're all talking about in this thread isn't itself the Social Contract. The SC will always be a matter of real-life interactions in space and time; and much of it will be non-verbal. I even suggest that much of it can't be verbalized by most or even all people.

What a one-sheet does is help focus everybody's imaginative attention in some way, and provides a nice confirmation that the (real) Social Contract exists. Its secondary role is also to provide some mechanics help, especially for stuff that needs to be understood in the first session.