Then David Caune mentioned having an independent head of state. This is definitely a true answer, but not a complete one. Just have a look at Germany, Italy or Ireland (but not at Portugal or Czech Republic!). They have independent heads of state, and they are republics. Parliamentary republics. read more
The constitutional monarchy is in that sense a compromise: Institute a more republican government (to please the revolutionaries), and keep a foot in the old ways and power systems (to please the anti-revolutionaries). read more
Britain's constitutional arrangements have, over the past three hundred years, evolved into a sound means of combining republican principles with the continuity and symbolism that can only be provided by a monarchy. read more
A constitutional monarchy is a form of monarchy in which the sovereign exercises authority in accordance with a written or unwritten constitution. Constitutional monarchy differs from absolute monarchy (in which a monarch holds absolute power), in that constitutional monarchs are bound to exercise their powers and authorities within the limits prescribed within an established legal framework. read more