User blog comment:Tbguy1992/My Theory/Opinion of Alternate History/@comment-4843137-20140522184926

Alternate history is pretty broad, and though the butterfly effect is pretty plausible, you could use alternatives to develop your althistory such as the ever-infamous ASBs.

There are two types of althistory IMO. You have the type that starts with a POD and develops outward, and you have althistory with an end result in mind and you work backwards.