The reality is a little more complicated, as F. H. Buckley reports in his book, The Once and Future King: The Rise of Crown Government in America (Encounter Books, 2014). James Madison is often said to be one of the key architects of the Constitution of the United States, primarily because he defended it so eloquently in the Federalist Papers, a series of essays written to persuade the states to sign on to the new union. While this effort was successful, few are aware that Madison actually got little of what he had originally wanted out of the meetings held during the summer of 1787.
The majority of delegates to the constitutional convention thought the popular election of a president a very bad idea indeed. Better, they thought, to tether the chief executive to Congress, which would be responsible for putting him in office. Madison was one of a group of delegates from Virginia, arguably the most significant of the thirteen states and certainly the principal catalyst for bringing them together.
The Virginia Plan would have created a two-chamber legislature, the first chamber being directly elected by voters. The first chamber would in turn appoint the members of the second, and the two together would appoint a president, who would remain dependent on them for his power. In short, the Virginia Plan would have made the United States into a parliamentary system similar to Canada and Great Britain. Needless to say, the Virginians, including Madison, did not get their way, and we now associate Madison with a separation of powers constructed not so much out of principle as out of compromise between the larger and smaller states.
However, one element was missing from the ill-starred Virginia Plan. If, like our prime minister, the chief executive was to be dependent on Congress, the Virginians neglected to consider the need for a distinct head of state who would be counterpart to the monarch. We may think of the Queen and her representatives as ornamental fixtures in our own constitutional system, but this is not so. The principal role of the monarch is to ensure that there is always a government in place. She herself does not rule, but she must see to it that she has ministers in office capable of doing so. More significant yet, the Queen plays an essential unifying role that no mere prime minister can do. As J. R. Mallory put it, the monarchy
denies to political leaders the full splendour of their power and the excessive aggrandizement of their persons which come from the undisturbed occupancy of the centre of the stage. The symbolic value of the face of the leader on the postage stamp, the open and undisguised role of the leader and redeemer of the people, are hints of the threatened presence of the one-party state.
Indeed, as Buckley points out, the majority of countries with American-style presidential systems have gone through periods of dictatorship, and the concentration of executive power in one person makes this more likely.
By contrast, parliamentary systems with a divided executive tend disproportionately to be stable and more democratic for longer periods of time. This includes constitutional monarchies, like Britain and the Netherlands, but also parliamentary republics such as Germany, where a president serves as head of state and a chancellor as head of government.
If Madison and his fellow Virginians had had their way back in 1787, today the United States might look more like, well, us!
Principalities & Powers, Christian Courier, April 2017.