Paul and Dan untangle the strange history of multi-classing in D&D. Was the elf in OD&D really allowed to swap between fighter and wizard whenever they liked? Why did B/X boil it all down to "race as class"? How did AD&D try to square the circle with dual-class humans and hard racial limits? We’ll trace how each edition wrestled with the problem, and compare it to the house rules we use today in our own games.