The congress was very powerful at the time and needed to be put in line. The two branches were created to control it. The remaining two branches were not specifically enumerated as thoroughly because they were still weak at the time and their power developed over time.
Well history does show us some pretty cool heroes and some pretty bad villains, but some stories from history are not real for example Poseidon god of the see in Greek myth. Greek myth can be counted as part of history.
Check out this website it might help
https://www.armstrong.edu/history-journal/history-journal-colonial-controversy-examining-the-british...
An amendment can be proposed by either a two-thirds vote of both houses of Congress or by a constitutional convention called by Congress at the request of the legislatures in two-thirds of the states. The constitutional convention method has never been used to propose an amendment.
Tell me if you need more info :)
