Government moves more slowly; There can be lack of cooperation and conflicting interests. There's a lot of one step forward, one step back as one branch checks/balances another.
The Romans did not have three branches of government. This is a modern concept.
The separation of powers between the three branches of government is assured by having distinct roles for each branch. The three branches of government are executive, legislative and judiciary..
The US Constitutional Convention was ratified in 1789. This "agreement of sorts" laid the foundation of the US having three separate branches of government in the Federal government.
Compare and contrast the three branches of the Arizona state government with the three branches of the federal government.
Montesquieu Believed the government should divide itself according to its powers which would create the three branches in the government Judicial, Legislative, and Executive.
Montesquieu
Constitutional limits exist for all three branches of government.
The three branches are executive, legislative, judicial.
The three branches of government are the Executive branch, Legislative branch and the Judicial branch.
The three branches of the Canadian government are the Monarchy and the Executive, Legislative, and Judicial branches.
The Three branches of government are the Legislature, Judicial, and Executive
Spain has the normal three branches of government: Executive, legislative, and judicial branches.