The Order of the Alphabet

The order of the alphabet has never made any sense, says linguist John McWhorter. The best he can do is to say that X, Y, and Z are hanging down at the end because with the first alphabet, you didn't need an X or a Y or a Z. But if we're talking about Y, it's B, C, D, E, F, G, the answer really is red, yellow, and green.