The cycle of "old wars" between nation states, followed by revolutionary wars and culminating during the 20th century into wars between communities was graphically described and codified by Professor Mary Kaldor in her "New Wars, Old Wars" theory. In this episode, she reflects with Peter Roberts on how this cycle works in contemporary politics. They also discuss human security and the individualisation of conflict, and wrap up with some conclusions about what this might mean for today's militaries.