How does Britain decide to go to war? And how should she?The long-standing Parliamentary convention known as the "Royal Prerogative" has always allowed Prime Ministers to take the country to war without any formal approval by Parliament. The dramatic vote against any military strike on Syria on August 29, 2013, blew that convention wide open, and risks hampering Great Britain's role as a force for good in the world in the future. Will MPs ever vote for war? Perhaps not--and this book proposes a radical solution to the resulting national emasculation. By writing the theory of a Just War (its causes, conduct, and ending) into law, Parliament would allow the Prime Minister to act without hindrance, thanks not to a Royal Prerogative, but to a Parliamentary one. With a highly readable tone, this book provides an expert answer to a complex and highly controversial topic--one with huge constitutional and historical significance for Britain.