Have a look at 'the French revolution' for one instance in time where it worked reasonably well. The French royalty and its associated entourage had become such a drain on the country that the French decided to get rid of them in the most drastic fashion possible.
Yes it was gruesome and bloody. But it did move France forward in time ahead of some other European countries that even today have not managed to rid themselves of their God anointed overlords.
Of course there are plenty of counter examples but it doesn't always have to be bad.
As I wrote elsewhere in this thread, the period of a revolution itself is extremely messy and it could go either way. But I think that it is impossible to argue that France was eventually worse off because of the revolution.
Yes it was gruesome and bloody. But it did move France forward in time ahead of some other European countries that even today have not managed to rid themselves of their God anointed overlords.
Of course there are plenty of counter examples but it doesn't always have to be bad.