Do the Geneva Conventions Matter?

The Geneva Conventions are the best-known and longest-established laws governing warfare, but what difference do they make to how states engage in armed conflict? Since the start of the "War on Terror" with 9/11, these protocols have increasingly been incorporated into public discussion. We have entered an era where contemporary wars often involve terrorism and guerrilla tactics, but how have the rules that were designed for more conventional forms of interstate violence adjusted?

Do the Ge...