Why do you think that not having three branches caused the Articles of Confederation to fail?

I think it is because power was only granted to the central government on a goodwill basis from the states and also due to lack of a strong central government.

Explanation:

hello,

answer: a federal government has final authority on interstate/inter provincial  and international affairs, a confederation is one where the central/national government or authority is governing body what does not have final say over the same matters. hopefully this and i will try again if you don't like this answer : )

best of luck!

answer; the above statement is (false);