[a] The system first arose as a result of political evolution in the United Kingdom over many centuries, as the powers of the monarch became constrained by Parliament.
[3] The term fusion of powers itself is believed to have been coined by the British constitutional expert Walter Bagehot.
[5] Government ministers are required to be members of parliament—but the federal judiciary strictly guards its independence from the other two branches.
[9] The Danish government relies on the confidence of the parliament, Folketinget, to stay in power.
The current French Fifth Republic provides an example of the fusion of powers from a country that does not follow the Westminster system.