I remember 5 alignment, remember when dual alignments didn't exist? Just good, evil, N, lawful, and chaotic?
My OD&D game uses the original 3 order, neutral, chaos, but good and evil do have a little bit of tie in, mainly due to magic. You could almost call it a 7 point ALN system, but the base 3 are the graph. Good & Evil are defined by order as one thing and Chaos as another. Basically order is "good" and chaos is bad for order and vice versa for chaos. Order is evil and chaos is good. It depends upon one's perspective.