In the past, the monarchy was pretty much synonymous with the country, and the monarchy was put there by God thanks to the 'Divine Right of Kings'. Personally, this is a ridiculously outdated notion - the national anthem should be contemporary (or at least timeless) to make it meaningful to US - the people living in the UK now, not a hundred years ago. God Save the Queen is also extremely dull - I think it should be changed to something more powerful like Jerusalem.