There are alot of good races for the warlock.  Undeadd has will of the forsaken and cannabalize which is just a way to regen mana.  But orcs have blood fury which along with amplify curse my curse of agony will pown anything.  Blood elves just kind of suck they have nothing that helps you out.  And who cares who the first warlock's were.  Does it even matter because i would say that orcs and undead are the best and that blood elves suck and you cant even be a nightelf lock in the game so wtf people.