Parmandur
Book-Friend, he/him
For Greyhawk, "tie it to the Setting" largely means "pick some vague paragraph about a place and/or factions and aggressively make everything up."That sort of runs contrary to the initial statement that @MGibster wanted the players to initially tie their characters to the setting. For that to happen, everyone around the table has to know more about the setting. Discovery through imaginative play is better IMO -- it means you can start with kind of a blank slate and when you encounter something in the world that piques your interest, you can suggest it be part of your backstory. but that wasn't what was suggested here.
People played the Setting for years with just a 32 page Gazateer that covered 40+ nations and multiple factions.