Playing as any immigrant friendly country, it strikes me that it would be beneficial to concentrate all immigrants in a single state to minimize the number of capis or railroads needed for the efficiency bonus. That one state should probably be the one with the best life-ratings in order to maximize population growth. So does anyone know the states with the highest average life-ratings in the game? I figure that even if it's not in my country, it might be worthwhile to conquer it and use it to concentrate as much of my population as possible.