Talk:Fire Lord/@comment-4879066-20130802235248/@comment-5888498-20130803000551

I think it's by male primogeniture, unless the leader goes against it and chooses another one as the rightful heir [such as Ozai with Azula and Zuko with his daughter]

So the England succession line is quite similar to the one in China, where naturally the eldest male son rises in power, difference is that England had more [ruling] Queens, while in China, most Empresses would have the title because they're the "first wive" [first in importance] of the Emperor.